diff --git a/booklore-api/src/test/java/com/adityachandel/booklore/service/metadata/BookCoverServiceTest.java b/booklore-api/src/test/java/com/adityachandel/booklore/service/metadata/BookCoverServiceTest.java
index 7c1e41db1..02a321682 100644
--- a/booklore-api/src/test/java/com/adityachandel/booklore/service/metadata/BookCoverServiceTest.java
+++ b/booklore-api/src/test/java/com/adityachandel/booklore/service/metadata/BookCoverServiceTest.java
@@ -3,6 +3,7 @@ package com.adityachandel.booklore.service.metadata;
 import com.adityachandel.booklore.exception.ApiError;
 import com.adityachandel.booklore.mapper.BookMetadataMapper;
 import com.adityachandel.booklore.model.dto.BookMetadata;
+import com.adityachandel.booklore.model.dto.settings.AppSettings;
 import com.adityachandel.booklore.model.dto.settings.MetadataPersistenceSettings;
 import com.adityachandel.booklore.model.entity.AuthorEntity;
 import com.adityachandel.booklore.model.entity.BookEntity;
@@ -26,11 +27,13 @@ import org.mockito.*;
 import org.springframework.transaction.support.TransactionTemplate;
 import org.springframework.web.multipart.MultipartFile;
 
-import java.time.Instant;
-import java.util.*;
 import java.nio.file.Path;
+import java.util.List;
+import java.util.Optional;
+import java.util.Set;
 
-import static org.assertj.core.api.Assertions.*;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.mockito.Mockito.*;
 
 class BookCoverServiceTest {
@@ -243,7 +246,7 @@ class BookCoverServiceTest {
         assertThat(result).isNotNull();
     }
 
-    private com.adityachandel.booklore.model.dto.settings.AppSettings mockAppSettings(boolean saveToOriginalFile, boolean convertCbrCb7ToCbz) {
+    private AppSettings mockAppSettings(boolean saveToOriginalFile, boolean convertCbrCb7ToCbz) {
         MetadataPersistenceSettings settings = new MetadataPersistenceSettings();
         settings.setSaveToOriginalFile(saveToOriginalFile);
         settings.setConvertCbrCb7ToCbz(convertCbrCb7ToCbz);
diff --git a/booklore-ui/angular.json b/booklore-ui/angular.json
index f0336f036..7ad3647fc 100644
--- a/booklore-ui/angular.json
+++ b/booklore-ui/angular.json
@@ -106,25 +106,7 @@
           "builder": "@angular/build:extract-i18n"
         },
         "test": {
-          "builder": "@angular/build:karma",
-          "options": {
-            "polyfills": [
-              "zone.js",
-              "zone.js/testing"
-            ],
-            "tsConfig": "tsconfig.spec.json",
-            "inlineStyleLanguage": "scss",
-            "assets": [
-              {
-                "glob": "**/*",
-                "input": "public"
-              }
-            ],
-            "styles": [
-              "src/styles.scss"
-            ],
-            "scripts": []
-          }
+          "builder": "@angular/build:unit-test"
         },
         "lint": {
           "builder": "@angular-eslint/builder:lint",
diff --git a/booklore-ui/package-lock.json b/booklore-ui/package-lock.json
index b4da98c36..15bd2683b 100644
--- a/booklore-ui/package-lock.json
+++ b/booklore-ui/package-lock.json
@@ -49,21 +49,26 @@
         "@angular/compiler-cli": "^21.0.5",
         "@tailwindcss/typography": "^0.5.19",
         "@types/jasmine": "^5.1.13",
+        "@types/node": "^25.0.3",
         "@types/showdown": "^2.0.6",
         "angular-eslint": "^21.1.0",
         "autoprefixer": "^10.4.23",
         "eslint": "^9.39.2",
         "jasmine-core": "^5.13.0",
-        "karma": "^6.4.4",
-        "karma-chrome-launcher": "^3.2.0",
-        "karma-coverage": "^2.2.1",
-        "karma-jasmine": "^5.1.0",
-        "karma-jasmine-html-reporter": "^2.1.0",
+        "jsdom": "^27.4.0",
         "tailwindcss": "^3.4.17",
         "typescript": "~5.9.3",
-        "typescript-eslint": "^8.50.0"
+        "typescript-eslint": "^8.50.0",
+        "vitest": "^4.0.16"
       }
     },
+    "node_modules/@acemir/cssom": {
+      "version": "0.9.30",
+      "resolved": "https://registry.npmjs.org/@acemir/cssom/-/cssom-0.9.30.tgz",
+      "integrity": "sha512-9CnlMCI0LmCIq0olalQqdWrJHPzm0/tw3gzOA9zJSgvFX7Xau3D24mAGa4BtwxwY69nsuJW6kQqqCzf/mEcQgg==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@algolia/abtesting": {
       "version": "1.6.1",
       "resolved": "https://registry.npmjs.org/@algolia/abtesting/-/abtesting-1.6.1.tgz",
@@ -800,6 +805,61 @@
         "rxjs": "^6.5.3 || ^7.4.0"
       }
     },
+    "node_modules/@asamuzakjp/css-color": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/@asamuzakjp/css-color/-/css-color-4.1.1.tgz",
+      "integrity": "sha512-B0Hv6G3gWGMn0xKJ0txEi/jM5iFpT3MfDxmhZFb4W047GvytCf1DHQ1D69W3zHI4yWe2aTZAA0JnbMZ7Xc8DuQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@csstools/css-calc": "^2.1.4",
+        "@csstools/css-color-parser": "^3.1.0",
+        "@csstools/css-parser-algorithms": "^3.0.5",
+        "@csstools/css-tokenizer": "^3.0.4",
+        "lru-cache": "^11.2.4"
+      }
+    },
+    "node_modules/@asamuzakjp/css-color/node_modules/lru-cache": {
+      "version": "11.2.4",
+      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-11.2.4.tgz",
+      "integrity": "sha512-B5Y16Jr9LB9dHVkh6ZevG+vAbOsNOYCX+sXvFWFu7B3Iz5mijW3zdbMyhsh8ANd2mSWBYdJgnqi+mL7/LrOPYg==",
+      "dev": true,
+      "license": "BlueOak-1.0.0",
+      "engines": {
+        "node": "20 || >=22"
+      }
+    },
+    "node_modules/@asamuzakjp/dom-selector": {
+      "version": "6.7.6",
+      "resolved": "https://registry.npmjs.org/@asamuzakjp/dom-selector/-/dom-selector-6.7.6.tgz",
+      "integrity": "sha512-hBaJER6A9MpdG3WgdlOolHmbOYvSk46y7IQN/1+iqiCuUu6iWdQrs9DGKF8ocqsEqWujWf/V7b7vaDgiUmIvUg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@asamuzakjp/nwsapi": "^2.3.9",
+        "bidi-js": "^1.0.3",
+        "css-tree": "^3.1.0",
+        "is-potential-custom-element-name": "^1.0.1",
+        "lru-cache": "^11.2.4"
+      }
+    },
+    "node_modules/@asamuzakjp/dom-selector/node_modules/lru-cache": {
+      "version": "11.2.4",
+      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-11.2.4.tgz",
+      "integrity": "sha512-B5Y16Jr9LB9dHVkh6ZevG+vAbOsNOYCX+sXvFWFu7B3Iz5mijW3zdbMyhsh8ANd2mSWBYdJgnqi+mL7/LrOPYg==",
+      "dev": true,
+      "license": "BlueOak-1.0.0",
+      "engines": {
+        "node": "20 || >=22"
+      }
+    },
+    "node_modules/@asamuzakjp/nwsapi": {
+      "version": "2.3.9",
+      "resolved": "https://registry.npmjs.org/@asamuzakjp/nwsapi/-/nwsapi-2.3.9.tgz",
+      "integrity": "sha512-n8GuYSrI9bF7FFZ/SjhwevlHc8xaVlb/7HmHelnc/PZXBD2ZR49NnN9sMMuDdEGPeeRQ5d0hqlSlEpgCX3Wl0Q==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@babel/code-frame": {
       "version": "7.27.1",
       "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.27.1.tgz",
@@ -1116,10 +1176,147 @@
       "integrity": "sha512-ooWCrlZP11i8GImSjTHYHLkvFDP48nS4+204nGb1RiX/WXYHmJA2III9/e2DWVabCESdW7hBAEzHRqUn9OUVvQ==",
       "dev": true,
       "license": "MIT",
+      "optional": true,
+      "peer": true,
       "engines": {
         "node": ">=0.1.90"
       }
     },
+    "node_modules/@csstools/color-helpers": {
+      "version": "5.1.0",
+      "resolved": "https://registry.npmjs.org/@csstools/color-helpers/-/color-helpers-5.1.0.tgz",
+      "integrity": "sha512-S11EXWJyy0Mz5SYvRmY8nJYTFFd1LCNV+7cXyAgQtOOuzb4EsgfqDufL+9esx72/eLhsRdGZwaldu/h+E4t4BA==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/csstools"
+        },
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/csstools"
+        }
+      ],
+      "license": "MIT-0",
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@csstools/css-calc": {
+      "version": "2.1.4",
+      "resolved": "https://registry.npmjs.org/@csstools/css-calc/-/css-calc-2.1.4.tgz",
+      "integrity": "sha512-3N8oaj+0juUw/1H3YwmDDJXCgTB1gKU6Hc/bB502u9zR0q2vd786XJH9QfrKIEgFlZmhZiq6epXl4rHqhzsIgQ==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/csstools"
+        },
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/csstools"
+        }
+      ],
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      },
+      "peerDependencies": {
+        "@csstools/css-parser-algorithms": "^3.0.5",
+        "@csstools/css-tokenizer": "^3.0.4"
+      }
+    },
+    "node_modules/@csstools/css-color-parser": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/@csstools/css-color-parser/-/css-color-parser-3.1.0.tgz",
+      "integrity": "sha512-nbtKwh3a6xNVIp/VRuXV64yTKnb1IjTAEEh3irzS+HkKjAOYLTGNb9pmVNntZ8iVBHcWDA2Dof0QtPgFI1BaTA==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/csstools"
+        },
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/csstools"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "@csstools/color-helpers": "^5.1.0",
+        "@csstools/css-calc": "^2.1.4"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "peerDependencies": {
+        "@csstools/css-parser-algorithms": "^3.0.5",
+        "@csstools/css-tokenizer": "^3.0.4"
+      }
+    },
+    "node_modules/@csstools/css-parser-algorithms": {
+      "version": "3.0.5",
+      "resolved": "https://registry.npmjs.org/@csstools/css-parser-algorithms/-/css-parser-algorithms-3.0.5.tgz",
+      "integrity": "sha512-DaDeUkXZKjdGhgYaHNJTV9pV7Y9B3b644jCLs9Upc3VeNGg6LWARAT6O+Q+/COo+2gg/bM5rhpMAtf70WqfBdQ==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/csstools"
+        },
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/csstools"
+        }
+      ],
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      },
+      "peerDependencies": {
+        "@csstools/css-tokenizer": "^3.0.4"
+      }
+    },
+    "node_modules/@csstools/css-syntax-patches-for-csstree": {
+      "version": "1.0.22",
+      "resolved": "https://registry.npmjs.org/@csstools/css-syntax-patches-for-csstree/-/css-syntax-patches-for-csstree-1.0.22.tgz",
+      "integrity": "sha512-qBcx6zYlhleiFfdtzkRgwNC7VVoAwfK76Vmsw5t+PbvtdknO9StgRk7ROvq9so1iqbdW4uLIDAsXRsTfUrIoOw==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/csstools"
+        },
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/csstools"
+        }
+      ],
+      "license": "MIT-0",
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@csstools/css-tokenizer": {
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/@csstools/css-tokenizer/-/css-tokenizer-3.0.4.tgz",
+      "integrity": "sha512-Vd/9EVDiu6PPJt9yAh6roZP6El1xHrdvIVGjyBsHR0RYwNHgL7FJPyIIW4fANJNG6FtyZfvlRPpFI4ZM/lubvw==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/csstools"
+        },
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/csstools"
+        }
+      ],
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@emnapi/core": {
       "version": "1.7.1",
       "resolved": "https://registry.npmjs.org/@emnapi/core/-/core-1.7.1.tgz",
@@ -1809,6 +2006,24 @@
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
       }
     },
+    "node_modules/@exodus/bytes": {
+      "version": "1.8.0",
+      "resolved": "https://registry.npmjs.org/@exodus/bytes/-/bytes-1.8.0.tgz",
+      "integrity": "sha512-8JPn18Bcp8Uo1T82gR8lh2guEOa5KKU/IEKvvdp0sgmi7coPBWf1Doi1EXsGZb2ehc8ym/StJCjffYV+ne7sXQ==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": "^20.19.0 || ^22.12.0 || >=24.0.0"
+      },
+      "peerDependencies": {
+        "@exodus/crypto": "^1.0.0-rc.4"
+      },
+      "peerDependenciesMeta": {
+        "@exodus/crypto": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/@humanfs/core": {
       "version": "0.19.1",
       "resolved": "https://registry.npmjs.org/@humanfs/core/-/core-0.19.1.tgz",
@@ -4322,14 +4537,15 @@
       "resolved": "https://registry.npmjs.org/@socket.io/component-emitter/-/component-emitter-3.1.2.tgz",
       "integrity": "sha512-9BCxFwvbGg/RsZK9tjXd8s4UcwR0MWeFQ1XEKIQVVvAGJyINdrqKMcTRyLoK8Rse1GjzLV9cwjWV1olXRWEXVA==",
       "dev": true,
-      "license": "MIT"
+      "license": "MIT",
+      "optional": true,
+      "peer": true
     },
     "node_modules/@standard-schema/spec": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/@standard-schema/spec/-/spec-1.1.0.tgz",
       "integrity": "sha512-l2aFy5jALhniG5HgqrD6jXLi/rUWrKvqN/qJx6yoJsgKhblVd+iqqU4RCXavm/jPityDo5TCvKMnpjKnOriy0w==",
-      "license": "MIT",
-      "peer": true
+      "license": "MIT"
     },
     "node_modules/@stomp/rx-stomp": {
       "version": "2.3.0",
@@ -4402,16 +4618,36 @@
         "tslib": "^2.4.0"
       }
     },
+    "node_modules/@types/chai": {
+      "version": "5.2.3",
+      "resolved": "https://registry.npmjs.org/@types/chai/-/chai-5.2.3.tgz",
+      "integrity": "sha512-Mw558oeA9fFbv65/y4mHtXDs9bPnFMZAL/jxdPFUpOHHIXX91mcgEHbS5Lahr+pwZFR8A7GQleRWeI6cGFC2UA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/deep-eql": "*",
+        "assertion-error": "^2.0.1"
+      }
+    },
     "node_modules/@types/cors": {
       "version": "2.8.19",
       "resolved": "https://registry.npmjs.org/@types/cors/-/cors-2.8.19.tgz",
       "integrity": "sha512-mFNylyeyqN93lfe/9CSxOGREz8cpzAhH+E93xJ4xWQf62V8sQ/24reV2nyzUWM6H6Xji+GGHpkbLe7pVoUEskg==",
       "dev": true,
       "license": "MIT",
+      "optional": true,
+      "peer": true,
       "dependencies": {
         "@types/node": "*"
       }
     },
+    "node_modules/@types/deep-eql": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/@types/deep-eql/-/deep-eql-4.0.2.tgz",
+      "integrity": "sha512-c9h9dVVMigMPc4bwTvC5dxqtqJZwQPePsWjPlpSOnojbor6pGqdk541lfA7AqFQr5pB1BRdq0juY9db81BwyFw==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@types/estree": {
       "version": "1.0.8",
       "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.8.tgz",
@@ -4444,9 +4680,9 @@
       }
     },
     "node_modules/@types/node": {
-      "version": "24.10.1",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-24.10.1.tgz",
-      "integrity": "sha512-GNWcUTRBgIRJD5zj+Tq0fKOJ5XZajIiBroOF0yvj2bSU1WvNdYS/dn9UxwsujGW4JX06dnHyjV2y9rRaybH0iQ==",
+      "version": "25.0.3",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-25.0.3.tgz",
+      "integrity": "sha512-W609buLVRVmeW693xKfzHeIV6nJGGz98uCPfeXI1ELMLXVeKYZ9m15fAMSaUPBHYLGFsVRcMmSCksQOrZV9BYA==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -4706,6 +4942,137 @@
         "vite": "^6.0.0 || ^7.0.0"
       }
     },
+    "node_modules/@vitest/expect": {
+      "version": "4.0.16",
+      "resolved": "https://registry.npmjs.org/@vitest/expect/-/expect-4.0.16.tgz",
+      "integrity": "sha512-eshqULT2It7McaJkQGLkPjPjNph+uevROGuIMJdG3V+0BSR2w9u6J9Lwu+E8cK5TETlfou8GRijhafIMhXsimA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@standard-schema/spec": "^1.0.0",
+        "@types/chai": "^5.2.2",
+        "@vitest/spy": "4.0.16",
+        "@vitest/utils": "4.0.16",
+        "chai": "^6.2.1",
+        "tinyrainbow": "^3.0.3"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      }
+    },
+    "node_modules/@vitest/mocker": {
+      "version": "4.0.16",
+      "resolved": "https://registry.npmjs.org/@vitest/mocker/-/mocker-4.0.16.tgz",
+      "integrity": "sha512-yb6k4AZxJTB+q9ycAvsoxGn+j/po0UaPgajllBgt1PzoMAAmJGYFdDk0uCcRcxb3BrME34I6u8gHZTQlkqSZpg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@vitest/spy": "4.0.16",
+        "estree-walker": "^3.0.3",
+        "magic-string": "^0.30.21"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      },
+      "peerDependencies": {
+        "msw": "^2.4.9",
+        "vite": "^6.0.0 || ^7.0.0-0"
+      },
+      "peerDependenciesMeta": {
+        "msw": {
+          "optional": true
+        },
+        "vite": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/@vitest/mocker/node_modules/magic-string": {
+      "version": "0.30.21",
+      "resolved": "https://registry.npmjs.org/magic-string/-/magic-string-0.30.21.tgz",
+      "integrity": "sha512-vd2F4YUyEXKGcLHoq+TEyCjxueSeHnFxyyjNp80yg0XV4vUhnDer/lvvlqM/arB5bXQN5K2/3oinyCRyx8T2CQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@jridgewell/sourcemap-codec": "^1.5.5"
+      }
+    },
+    "node_modules/@vitest/pretty-format": {
+      "version": "4.0.16",
+      "resolved": "https://registry.npmjs.org/@vitest/pretty-format/-/pretty-format-4.0.16.tgz",
+      "integrity": "sha512-eNCYNsSty9xJKi/UdVD8Ou16alu7AYiS2fCPRs0b1OdhJiV89buAXQLpTbe+X8V9L6qrs9CqyvU7OaAopJYPsA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "tinyrainbow": "^3.0.3"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      }
+    },
+    "node_modules/@vitest/runner": {
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       "dev": true,
       "license": "MIT",
+      "optional": true,
+      "peer": true,
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       },
@@ -11211,6 +11765,8 @@
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       "dev": true,
       "license": "MIT",
+      "optional": true,
+      "peer": true,
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@@ -11221,6 +11777,8 @@
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       "dev": true,
       "license": "MIT",
+      "optional": true,
+      "peer": true,
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       },
@@ -11234,6 +11792,8 @@
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       "dev": true,
       "license": "MIT",
+      "optional": true,
+      "peer": true,
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         "node": ">= 0.6"
       }
@@ -11357,6 +11917,13 @@
         "node": "^18.17.0 || >=20.5.0"
       }
     },
+    "node_modules/stackback": {
+      "version": "0.0.2",
+      "resolved": "https://registry.npmjs.org/stackback/-/stackback-0.0.2.tgz",
+      "integrity": "sha512-1XMJE5fQo1jGH6Y/7ebnwPOBEkIEnT4QF32d5R1+VXdXveM0IBMJt8zfaxX1P3QhVwrYe+576+jkANtSS2mBbw==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/statuses": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/statuses/-/statuses-2.0.2.tgz",
@@ -11367,6 +11934,13 @@
         "node": ">= 0.8"
       }
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+    "node_modules/std-env": {
+      "version": "3.10.0",
+      "resolved": "https://registry.npmjs.org/std-env/-/std-env-3.10.0.tgz",
+      "integrity": "sha512-5GS12FdOZNliM5mAOxFRg7Ir0pWz8MdpYm6AY6VPkGpbA7ZzmbzNcBJQ0GPvvyWgcY7QAhCgf9Uy89I03faLkg==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/stdin-discarder": {
       "version": "0.2.2",
       "resolved": "https://registry.npmjs.org/stdin-discarder/-/stdin-discarder-0.2.2.tgz",
@@ -11386,6 +11960,8 @@
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       "dev": true,
       "license": "MIT",
+      "optional": true,
+      "peer": true,
       "dependencies": {
         "date-format": "^4.0.14",
         "debug": "^4.3.4",
@@ -11507,6 +12083,13 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/symbol-tree": {
+      "version": "3.2.4",
+      "resolved": "https://registry.npmjs.org/symbol-tree/-/symbol-tree-3.2.4.tgz",
+      "integrity": "sha512-9QNk5KwDF+Bvz+PyObkmSYjI5ksVUYtjW7AU22r2NKcfLJcXp96hkDWU3+XndOsUb+AQ9QhfzfCT2O+CNWT5Tw==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/tailwindcss": {
       "version": "3.4.18",
       "resolved": "https://registry.npmjs.org/tailwindcss/-/tailwindcss-3.4.18.tgz",
@@ -11683,6 +12266,23 @@
         "node": ">=0.8"
       }
     },
+    "node_modules/tinybench": {
+      "version": "2.9.0",
+      "resolved": "https://registry.npmjs.org/tinybench/-/tinybench-2.9.0.tgz",
+      "integrity": "sha512-0+DUvqWMValLmha6lr4kD8iAMK1HzV0/aKnCtWb9v9641TnP/MFb7Pc2bxoxQjTXAErryXVgUOfv2YqNllqGeg==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/tinyexec": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/tinyexec/-/tinyexec-1.0.2.tgz",
+      "integrity": "sha512-W/KYk+NFhkmsYpuHq5JykngiOCnxeVL8v8dFnqxSD8qEEdRfXk1SDM6JzNqcERbcGYj9tMrDQBYV9cjgnunFIg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/tinyglobby": {
       "version": "0.2.15",
       "resolved": "https://registry.npmjs.org/tinyglobby/-/tinyglobby-0.2.15.tgz",
@@ -11699,12 +12299,44 @@
         "url": "https://github.com/sponsors/SuperchupuDev"
       }
     },
+    "node_modules/tinyrainbow": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/tinyrainbow/-/tinyrainbow-3.0.3.tgz",
+      "integrity": "sha512-PSkbLUoxOFRzJYjjxHJt9xro7D+iilgMX/C9lawzVuYiIdcihh9DXmVibBe8lmcFrRi/VzlPjBxbN7rH24q8/Q==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=14.0.0"
+      }
+    },
+    "node_modules/tldts": {
+      "version": "7.0.19",
+      "resolved": "https://registry.npmjs.org/tldts/-/tldts-7.0.19.tgz",
+      "integrity": "sha512-8PWx8tvC4jDB39BQw1m4x8y5MH1BcQ5xHeL2n7UVFulMPH/3Q0uiamahFJ3lXA0zO2SUyRXuVVbWSDmstlt9YA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "tldts-core": "^7.0.19"
+      },
+      "bin": {
+        "tldts": "bin/cli.js"
+      }
+    },
+    "node_modules/tldts-core": {
+      "version": "7.0.19",
+      "resolved": "https://registry.npmjs.org/tldts-core/-/tldts-core-7.0.19.tgz",
+      "integrity": "sha512-lJX2dEWx0SGH4O6p+7FPwYmJ/bu1JbcGJ8RLaG9b7liIgZ85itUVEPbMtWRVrde/0fnDPEPHW10ZsKW3kVsE9A==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/tmp": {
       "version": "0.2.5",
       "resolved": "https://registry.npmjs.org/tmp/-/tmp-0.2.5.tgz",
       "integrity": "sha512-voyz6MApa1rQGUxT3E+BK7/ROe8itEx7vD8/HEvt4xwXucvQ5G5oeEiHkmHZJuBO21RpOf+YYm9MOivj709jow==",
       "dev": true,
       "license": "MIT",
+      "optional": true,
+      "peer": true,
       "engines": {
         "node": ">=14.14"
       }
@@ -11731,6 +12363,42 @@
         "node": ">=0.6"
       }
     },
+    "node_modules/tough-cookie": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-6.0.0.tgz",
+      "integrity": "sha512-kXuRi1mtaKMrsLUxz3sQYvVl37B0Ns6MzfrtV5DvJceE9bPyspOqk9xxv7XbZWcfLWbFmm997vl83qUWVJA64w==",
+      "dev": true,
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "tldts": "^7.0.5"
+      },
+      "engines": {
+        "node": ">=16"
+      }
+    },
+    "node_modules/tr46": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/tr46/-/tr46-6.0.0.tgz",
+      "integrity": "sha512-bLVMLPtstlZ4iMQHpFHTR7GAGj2jxi8Dg0s2h2MafAE4uSWF98FC/3MomU51iQAMf8/qDUbKWf5GxuvvVcXEhw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "punycode": "^2.3.1"
+      },
+      "engines": {
+        "node": ">=20"
+      }
+    },
+    "node_modules/tr46/node_modules/punycode": {
+      "version": "2.3.1",
+      "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.3.1.tgz",
+      "integrity": "sha512-vYt7UD1U9Wg6138shLtLOvdAu+8DsC/ilFtEVHcH+wydcSpNE20AfSOduf6MkRFahL5FY7X1oU7nKVZFtfq8Fg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/ts-api-utils": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/ts-api-utils/-/ts-api-utils-2.1.0.tgz",
@@ -11863,6 +12531,8 @@
         }
       ],
       "license": "MIT",
+      "optional": true,
+      "peer": true,
       "bin": {
         "ua-parser-js": "script/cli.js"
       },
@@ -11919,6 +12589,8 @@
       "integrity": "sha512-rBJeI5CXAlmy1pV+617WB9J63U6XcazHHF2f2dbJix4XzpUF0RS3Zbj0FGIOCAva5P/d/GBOYaACQ1w+0azUkg==",
       "dev": true,
       "license": "MIT",
+      "optional": true,
+      "peer": true,
       "engines": {
         "node": ">= 4.0.0"
       }
@@ -11996,6 +12668,8 @@
       "integrity": "sha512-pMZTvIkT1d+TFGvDOqodOclx0QWkkgi6Tdoa8gC8ffGAAqz9pzPTZWAybbsHHoED/ztMtkv/VoYTYyShUn81hA==",
       "dev": true,
       "license": "MIT",
+      "optional": true,
+      "peer": true,
       "engines": {
         "node": ">= 0.4.0"
       }
@@ -12604,16 +13278,119 @@
         "@esbuild/win32-x64": "0.25.12"
       }
     },
+    "node_modules/vitest": {
+      "version": "4.0.16",
+      "resolved": "https://registry.npmjs.org/vitest/-/vitest-4.0.16.tgz",
+      "integrity": "sha512-E4t7DJ9pESL6E3I8nFjPa4xGUd3PmiWDLsDztS2qXSJWfHtbQnwAWylaBvSNY48I3vr8PTqIZlyK8TE3V3CA4Q==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@vitest/expect": "4.0.16",
+        "@vitest/mocker": "4.0.16",
+        "@vitest/pretty-format": "4.0.16",
+        "@vitest/runner": "4.0.16",
+        "@vitest/snapshot": "4.0.16",
+        "@vitest/spy": "4.0.16",
+        "@vitest/utils": "4.0.16",
+        "es-module-lexer": "^1.7.0",
+        "expect-type": "^1.2.2",
+        "magic-string": "^0.30.21",
+        "obug": "^2.1.1",
+        "pathe": "^2.0.3",
+        "picomatch": "^4.0.3",
+        "std-env": "^3.10.0",
+        "tinybench": "^2.9.0",
+        "tinyexec": "^1.0.2",
+        "tinyglobby": "^0.2.15",
+        "tinyrainbow": "^3.0.3",
+        "vite": "^6.0.0 || ^7.0.0",
+        "why-is-node-running": "^2.3.0"
+      },
+      "bin": {
+        "vitest": "vitest.mjs"
+      },
+      "engines": {
+        "node": "^20.0.0 || ^22.0.0 || >=24.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      },
+      "peerDependencies": {
+        "@edge-runtime/vm": "*",
+        "@opentelemetry/api": "^1.9.0",
+        "@types/node": "^20.0.0 || ^22.0.0 || >=24.0.0",
+        "@vitest/browser-playwright": "4.0.16",
+        "@vitest/browser-preview": "4.0.16",
+        "@vitest/browser-webdriverio": "4.0.16",
+        "@vitest/ui": "4.0.16",
+        "happy-dom": "*",
+        "jsdom": "*"
+      },
+      "peerDependenciesMeta": {
+        "@edge-runtime/vm": {
+          "optional": true
+        },
+        "@opentelemetry/api": {
+          "optional": true
+        },
+        "@types/node": {
+          "optional": true
+        },
+        "@vitest/browser-playwright": {
+          "optional": true
+        },
+        "@vitest/browser-preview": {
+          "optional": true
+        },
+        "@vitest/browser-webdriverio": {
+          "optional": true
+        },
+        "@vitest/ui": {
+          "optional": true
+        },
+        "happy-dom": {
+          "optional": true
+        },
+        "jsdom": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/vitest/node_modules/magic-string": {
+      "version": "0.30.21",
+      "resolved": "https://registry.npmjs.org/magic-string/-/magic-string-0.30.21.tgz",
+      "integrity": "sha512-vd2F4YUyEXKGcLHoq+TEyCjxueSeHnFxyyjNp80yg0XV4vUhnDer/lvvlqM/arB5bXQN5K2/3oinyCRyx8T2CQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@jridgewell/sourcemap-codec": "^1.5.5"
+      }
+    },
     "node_modules/void-elements": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/void-elements/-/void-elements-2.0.1.tgz",
       "integrity": "sha512-qZKX4RnBzH2ugr8Lxa7x+0V6XD9Sb/ouARtiasEQCHB1EVU4NXtmHsDDrx1dO4ne5fc3J6EW05BP1Dl0z0iung==",
       "dev": true,
       "license": "MIT",
+      "optional": true,
+      "peer": true,
       "engines": {
         "node": ">=0.10.0"
       }
     },
+    "node_modules/w3c-xmlserializer": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/w3c-xmlserializer/-/w3c-xmlserializer-5.0.0.tgz",
+      "integrity": "sha512-o8qghlI8NZHU1lLPrpi2+Uq7abh4GGPpYANlalzWxyWteJOCsr/P+oPBA49TOLu5FTZO4d3F9MnWJfiMo4BkmA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "xml-name-validator": "^5.0.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/watchpack": {
       "version": "2.4.4",
       "resolved": "https://registry.npmjs.org/watchpack/-/watchpack-2.4.4.tgz",
@@ -12636,6 +13413,40 @@
       "license": "MIT",
       "optional": true
     },
+    "node_modules/webidl-conversions": {
+      "version": "8.0.1",
+      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-8.0.1.tgz",
+      "integrity": "sha512-BMhLD/Sw+GbJC21C/UgyaZX41nPt8bUTg+jWyDeg7e7YN4xOM05YPSIXceACnXVtqyEw/LMClUQMtMZ+PGGpqQ==",
+      "dev": true,
+      "license": "BSD-2-Clause",
+      "engines": {
+        "node": ">=20"
+      }
+    },
+    "node_modules/whatwg-mimetype": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/whatwg-mimetype/-/whatwg-mimetype-4.0.0.tgz",
+      "integrity": "sha512-QaKxh0eNIi2mE9p2vEdzfagOKHCcj1pJ56EEHGQOVxp8r9/iszLUUV7v89x9O1p/T+NlTM5W7jW6+cz4Fq1YVg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/whatwg-url": {
+      "version": "15.1.0",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-15.1.0.tgz",
+      "integrity": "sha512-2ytDk0kiEj/yu90JOAp44PVPUkO9+jVhyf+SybKlRHSDlvOOZhdPIrr7xTH64l4WixO2cP+wQIcgujkGBPPz6g==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "tr46": "^6.0.0",
+        "webidl-conversions": "^8.0.0"
+      },
+      "engines": {
+        "node": ">=20"
+      }
+    },
     "node_modules/which": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
@@ -12652,6 +13463,23 @@
         "node": ">= 8"
       }
     },
+    "node_modules/why-is-node-running": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/why-is-node-running/-/why-is-node-running-2.3.0.tgz",
+      "integrity": "sha512-hUrmaWBdVDcxvYqnyh09zunKzROWjbZTiNy8dBEjkS7ehEDQibXJ7XvlmtbwuTclUiIyN+CyXQD4Vmko8fNm8w==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "siginfo": "^2.0.0",
+        "stackback": "0.0.2"
+      },
+      "bin": {
+        "why-is-node-running": "cli.js"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/word-wrap": {
       "version": "1.2.5",
       "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.5.tgz",
@@ -12760,6 +13588,23 @@
         }
       }
     },
+    "node_modules/xml-name-validator": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/xml-name-validator/-/xml-name-validator-5.0.0.tgz",
+      "integrity": "sha512-EvGK8EJ3DhaHfbRlETOWAS5pO9MZITeauHKJyb8wyajUfQUenkIg2MvLDTZ4T/TgIcm3HU0TFBgWWboAZ30UHg==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/xmlchars": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/xmlchars/-/xmlchars-2.2.0.tgz",
+      "integrity": "sha512-JZnDKK8B0RCDw84FNdDAIpZK+JuJw+s7Lz8nksI7SIuU3UXJJslUthsi+uWBUYOwPFwW7W7PRLRfUKpxjtjFCw==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/y18n": {
       "version": "5.0.8",
       "resolved": "https://registry.npmjs.org/y18n/-/y18n-5.0.8.tgz",
diff --git a/booklore-ui/package.json b/booklore-ui/package.json
index a5bc92046..165c55573 100644
--- a/booklore-ui/package.json
+++ b/booklore-ui/package.json
@@ -53,18 +53,16 @@
     "@angular/compiler-cli": "^21.0.5",
     "@tailwindcss/typography": "^0.5.19",
     "@types/jasmine": "^5.1.13",
+    "@types/node": "^25.0.3",
     "@types/showdown": "^2.0.6",
     "angular-eslint": "^21.1.0",
     "autoprefixer": "^10.4.23",
     "eslint": "^9.39.2",
     "jasmine-core": "^5.13.0",
-    "karma": "^6.4.4",
-    "karma-chrome-launcher": "^3.2.0",
-    "karma-coverage": "^2.2.1",
-    "karma-jasmine": "^5.1.0",
-    "karma-jasmine-html-reporter": "^2.1.0",
+    "jsdom": "^27.4.0",
     "tailwindcss": "^3.4.17",
     "typescript": "~5.9.3",
-    "typescript-eslint": "^8.50.0"
+    "typescript-eslint": "^8.50.0",
+    "vitest": "^4.0.16"
   }
 }
diff --git a/booklore-ui/src/app/features/book/service/book-menu.service.spec.ts b/booklore-ui/src/app/features/book/service/book-menu.service.spec.ts
new file mode 100644
index 000000000..b44b2f490
--- /dev/null
+++ b/booklore-ui/src/app/features/book/service/book-menu.service.spec.ts
@@ -0,0 +1,466 @@
+import {beforeEach, describe, expect, it, vi} from 'vitest';
+import {TestBed} from '@angular/core/testing';
+import {EnvironmentInjector, runInInjectionContext} from '@angular/core';
+import {ConfirmationService, MessageService} from 'primeng/api';
+import {BookService} from './book.service';
+import {LoadingService} from '../../../core/services/loading.service';
+import {User} from '../../settings/user-management/user.service';
+import {ReadStatus} from '../model/book.model';
+import {ResetProgressTypes} from '../../../shared/constants/reset-progress-type';
+import {of, throwError} from 'rxjs';
+import {HttpErrorResponse} from '@angular/common/http';
+import {APIException} from '../../../shared/models/api-exception.model';
+import {BookMenuService} from './book-menu.service';
+
+describe('BookMenuService', () => {
+  let service: BookMenuService;
+  let confirmationService: any;
+  let messageService: any;
+  let bookService: any;
+  let loadingService: any;
+
+  const mockUser: User = {
+    id: 1,
+    username: 'testuser',
+    email: 'test@example.com',
+    permissions: {
+      canBulkAutoFetchMetadata: true,
+      canBulkCustomFetchMetadata: true,
+      canBulkEditMetadata: true,
+      canBulkRegenerateCover: true,
+      canBulkResetBookReadStatus: true,
+      canBulkResetBookloreReadProgress: true,
+      canBulkResetKoReaderReadProgress: true
+    }
+  } as User;
+
+  const mockUserNoPermissions: User = {
+    id: 2,
+    username: 'limiteduser',
+    email: 'limited@example.com',
+    permissions: {
+      canBulkAutoFetchMetadata: false,
+      canBulkCustomFetchMetadata: false,
+      canBulkEditMetadata: false,
+      canBulkRegenerateCover: false,
+      canBulkResetBookReadStatus: false,
+      canBulkResetBookloreReadProgress: false,
+      canBulkResetKoReaderReadProgress: false
+    }
+  } as User;
+
+  beforeEach(() => {
+    confirmationService = {
+      confirm: vi.fn()
+    };
+
+    messageService = {
+      add: vi.fn()
+    };
+
+    bookService = {
+      updateBookReadStatus: vi.fn(),
+      resetProgress: vi.fn()
+    };
+
+    loadingService = {
+      show: vi.fn().mockReturnValue('loader-id'),
+      hide: vi.fn()
+    };
+
+    TestBed.configureTestingModule({
+      providers: [
+        BookMenuService,
+        {provide: ConfirmationService, useValue: confirmationService},
+        {provide: MessageService, useValue: messageService},
+        {provide: BookService, useValue: bookService},
+        {provide: LoadingService, useValue: loadingService}
+      ]
+    });
+
+    const injector = TestBed.inject(EnvironmentInjector);
+
+    service = runInInjectionContext(
+      injector,
+      () => TestBed.inject(BookMenuService)
+    );
+  });
+
+  describe('getMetadataMenuItems', () => {
+    it('should return all metadata menu items when user has all permissions', () => {
+      const autoFetch = vi.fn();
+      const fetch = vi.fn();
+      const bulkEdit = vi.fn();
+      const multiEdit = vi.fn();
+      const regenerate = vi.fn();
+
+      const items = service.getMetadataMenuItems(
+        autoFetch,
+        fetch,
+        bulkEdit,
+        multiEdit,
+        regenerate,
+        mockUser
+      );
+
+      expect(items).toHaveLength(5);
+      expect(items[0].label).toBe('Auto Fetch Metadata');
+      expect(items[0].icon).toBe('pi pi-bolt');
+      expect(items[1].label).toBe('Custom Fetch Metadata');
+      expect(items[1].icon).toBe('pi pi-sync');
+      expect(items[2].label).toBe('Bulk Metadata Editor');
+      expect(items[2].icon).toBe('pi pi-table');
+      expect(items[3].label).toBe('Multi-Book Metadata Editor');
+      expect(items[3].icon).toBe('pi pi-clone');
+      expect(items[4].label).toBe('Regenerate Covers');
+      expect(items[4].icon).toBe('pi pi-image');
+    });
+
+    it('should return empty array when user has no permissions', () => {
+      const items = service.getMetadataMenuItems(
+        vi.fn(),
+        vi.fn(),
+        vi.fn(),
+        vi.fn(),
+        vi.fn(),
+        mockUserNoPermissions
+      );
+
+      expect(items).toHaveLength(0);
+    });
+
+    it('should return empty array when user is null', () => {
+      const items = service.getMetadataMenuItems(
+        vi.fn(),
+        vi.fn(),
+        vi.fn(),
+        vi.fn(),
+        vi.fn(),
+        null
+      );
+
+      expect(items).toHaveLength(0);
+    });
+
+    it('should call command functions when menu items are clicked', () => {
+      const autoFetch = vi.fn();
+      const fetch = vi.fn();
+      const bulkEdit = vi.fn();
+      const multiEdit = vi.fn();
+      const regenerate = vi.fn();
+
+      const items = service.getMetadataMenuItems(
+        autoFetch,
+        fetch,
+        bulkEdit,
+        multiEdit,
+        regenerate,
+        mockUser
+      );
+
+      items[0].command!({} as any);
+      expect(autoFetch).toHaveBeenCalledOnce();
+
+      items[1].command!({} as any);
+      expect(fetch).toHaveBeenCalledOnce();
+
+      items[2].command!({} as any);
+      expect(bulkEdit).toHaveBeenCalledOnce();
+
+      items[3].command!({} as any);
+      expect(multiEdit).toHaveBeenCalledOnce();
+
+      items[4].command!({} as any);
+      expect(regenerate).toHaveBeenCalledOnce();
+    });
+
+    it('should return only items for granted permissions', () => {
+      const partialUser: User = {
+        ...mockUser,
+        permissions: {
+          ...mockUser.permissions,
+          canBulkAutoFetchMetadata: true,
+          canBulkCustomFetchMetadata: false,
+          canBulkEditMetadata: true,
+          canBulkRegenerateCover: false
+        }
+      } as User;
+
+      const items = service.getMetadataMenuItems(
+        vi.fn(),
+        vi.fn(),
+        vi.fn(),
+        vi.fn(),
+        vi.fn(),
+        partialUser
+      );
+
+      expect(items).toHaveLength(3);
+      expect(items[0].label).toBe('Auto Fetch Metadata');
+      expect(items[1].label).toBe('Bulk Metadata Editor');
+      expect(items[2].label).toBe('Multi-Book Metadata Editor');
+    });
+  });
+
+  describe('getBulkReadActionsMenu', () => {
+    it('should return all read action items when user has all permissions', () => {
+      const selectedBooks = new Set([1, 2, 3]);
+      const items = service.getBulkReadActionsMenu(selectedBooks, mockUser);
+
+      expect(items).toHaveLength(3);
+      expect(items[0].label).toBe('Update Read Status');
+      expect(items[0].icon).toBe('pi pi-book');
+      expect(items[0].items).toBeDefined();
+      expect(items[0].items!.length).toBeGreaterThan(0);
+      expect(items[1].label).toBe('Reset Booklore Progress');
+      expect(items[1].icon).toBe('pi pi-undo');
+      expect(items[2].label).toBe('Reset KOReader Progress');
+      expect(items[2].icon).toBe('pi pi-undo');
+    });
+
+    it('should return empty array when user has no permissions', () => {
+      const selectedBooks = new Set([1, 2, 3]);
+      const items = service.getBulkReadActionsMenu(selectedBooks, mockUserNoPermissions);
+
+      expect(items).toHaveLength(0);
+    });
+
+    it('should return empty array when user is null', () => {
+      const selectedBooks = new Set([1, 2, 3]);
+      const items = service.getBulkReadActionsMenu(selectedBooks, null);
+
+      expect(items).toHaveLength(0);
+    });
+
+    it('should show confirmation dialog when updating read status', () => {
+      const selectedBooks = new Set([1, 2, 3]);
+      const items = service.getBulkReadActionsMenu(selectedBooks, mockUser);
+
+      const readStatusItems = items[0].items!;
+      readStatusItems[0].command!({} as any);
+
+      expect(confirmationService.confirm).toHaveBeenCalledOnce();
+      const confirmCall = vi.mocked(confirmationService.confirm).mock.calls[0][0];
+      expect(confirmCall.message).toContain('3 book(s)');
+      expect(confirmCall.header).toBe('Confirm Read Status Update');
+    });
+
+    it('should update read status on confirmation accept', () => {
+      const selectedBooks = new Set([1, 2, 3]);
+      vi.mocked(bookService.updateBookReadStatus).mockReturnValue(of([]));
+
+      const items = service.getBulkReadActionsMenu(selectedBooks, mockUser);
+      const readStatusItems = items[0].items!;
+
+      const readItem = readStatusItems.find(item => item.label === 'Read');
+      expect(readItem).toBeDefined();
+
+      readItem!.command!({} as any);
+
+      const confirmCall = vi.mocked(confirmationService.confirm).mock.calls[0][0];
+      confirmCall.accept!();
+
+      expect(loadingService.show).toHaveBeenCalledWith('Updating read status for 3 book(s)...');
+      expect(bookService.updateBookReadStatus).toHaveBeenCalledWith([1, 2, 3], ReadStatus.READ);
+      expect(loadingService.hide).toHaveBeenCalledWith('loader-id');
+      expect(messageService.add).toHaveBeenCalledWith({
+        severity: 'success',
+        summary: 'Read Status Updated',
+        detail: 'Marked as "Read"',
+        life: 2000
+      });
+    });
+
+    it('should show error message when read status update fails', () => {
+      const selectedBooks = new Set([1, 2]);
+      const errorResponse = new HttpErrorResponse({
+        error: {message: 'Update failed'} as APIException,
+        status: 500
+      });
+      vi.mocked(bookService.updateBookReadStatus).mockReturnValue(throwError(() => errorResponse));
+
+      const items = service.getBulkReadActionsMenu(selectedBooks, mockUser);
+      const readStatusItems = items[0].items!;
+
+      readStatusItems[0].command!({} as any);
+
+      const confirmCall = vi.mocked(confirmationService.confirm).mock.calls[0][0];
+      confirmCall.accept!();
+
+      expect(messageService.add).toHaveBeenCalledWith({
+        severity: 'error',
+        summary: 'Update Failed',
+        detail: 'Update failed',
+        life: 3000
+      });
+    });
+
+    it('should show confirmation dialog when resetting Booklore progress', () => {
+      const selectedBooks = new Set([1, 2, 3]);
+      const items = service.getBulkReadActionsMenu(selectedBooks, mockUser);
+
+      items[1].command!({} as any);
+
+      expect(confirmationService.confirm).toHaveBeenCalledOnce();
+      const confirmCall = vi.mocked(confirmationService.confirm).mock.calls[0][0];
+      expect(confirmCall.message).toContain('3 book(s)');
+      expect(confirmCall.header).toBe('Confirm Reset');
+    });
+
+    it('should reset Booklore progress on confirmation accept', () => {
+      const selectedBooks = new Set([5, 6]);
+      vi.mocked(bookService.resetProgress).mockReturnValue(of([]));
+
+      const items = service.getBulkReadActionsMenu(selectedBooks, mockUser);
+      items[1].command!({} as any);
+
+      const confirmCall = vi.mocked(confirmationService.confirm).mock.calls[0][0];
+      confirmCall.accept!();
+
+      expect(loadingService.show).toHaveBeenCalledWith('Resetting Booklore progress for 2 book(s)...');
+      expect(bookService.resetProgress).toHaveBeenCalledWith([5, 6], ResetProgressTypes.BOOKLORE);
+      expect(loadingService.hide).toHaveBeenCalledWith('loader-id');
+      expect(messageService.add).toHaveBeenCalledWith({
+        severity: 'success',
+        summary: 'Progress Reset',
+        detail: 'Booklore reading progress has been reset.',
+        life: 1500
+      });
+    });
+
+    it('should show error message when Booklore progress reset fails', () => {
+      const selectedBooks = new Set([1]);
+      const errorResponse = new HttpErrorResponse({
+        error: {message: 'Reset failed'} as APIException,
+        status: 500
+      });
+      vi.mocked(bookService.resetProgress).mockReturnValue(throwError(() => errorResponse));
+
+      const items = service.getBulkReadActionsMenu(selectedBooks, mockUser);
+      items[1].command!({} as any);
+
+      const confirmCall = vi.mocked(confirmationService.confirm).mock.calls[0][0];
+      confirmCall.accept!();
+
+      expect(messageService.add).toHaveBeenCalledWith({
+        severity: 'error',
+        summary: 'Failed',
+        detail: 'Reset failed',
+        life: 3000
+      });
+    });
+
+    it('should show confirmation dialog when resetting KOReader progress', () => {
+      const selectedBooks = new Set([7, 8]);
+      const items = service.getBulkReadActionsMenu(selectedBooks, mockUser);
+
+      items[2].command!({} as any);
+
+      expect(confirmationService.confirm).toHaveBeenCalledOnce();
+      const confirmCall = vi.mocked(confirmationService.confirm).mock.calls[0][0];
+      expect(confirmCall.message).toContain('2 book(s)');
+      expect(confirmCall.message).toContain('KOReader');
+      expect(confirmCall.header).toBe('Confirm Reset');
+    });
+
+    it('should reset KOReader progress on confirmation accept', () => {
+      const selectedBooks = new Set([9]);
+      vi.mocked(bookService.resetProgress).mockReturnValue(of([]));
+
+      const items = service.getBulkReadActionsMenu(selectedBooks, mockUser);
+      items[2].command!({} as any);
+
+      const confirmCall = vi.mocked(confirmationService.confirm).mock.calls[0][0];
+      confirmCall.accept!();
+
+      expect(loadingService.show).toHaveBeenCalledWith('Resetting KOReader progress for 1 book(s)...');
+      expect(bookService.resetProgress).toHaveBeenCalledWith([9], ResetProgressTypes.KOREADER);
+      expect(loadingService.hide).toHaveBeenCalledWith('loader-id');
+      expect(messageService.add).toHaveBeenCalledWith({
+        severity: 'success',
+        summary: 'Progress Reset',
+        detail: 'KOReader reading progress has been reset.',
+        life: 1500
+      });
+    });
+
+    it('should show error message when KOReader progress reset fails', () => {
+      const selectedBooks = new Set([10]);
+      const errorResponse = new HttpErrorResponse({
+        error: {message: 'KOReader reset failed'} as APIException,
+        status: 500
+      });
+      vi.mocked(bookService.resetProgress).mockReturnValue(throwError(() => errorResponse));
+
+      const items = service.getBulkReadActionsMenu(selectedBooks, mockUser);
+      items[2].command!({} as any);
+
+      const confirmCall = vi.mocked(confirmationService.confirm).mock.calls[0][0];
+      confirmCall.accept!();
+
+      expect(messageService.add).toHaveBeenCalledWith({
+        severity: 'error',
+        summary: 'Failed',
+        detail: 'KOReader reset failed',
+        life: 3000
+      });
+    });
+
+    it('should handle API error without message gracefully', () => {
+      const selectedBooks = new Set([1]);
+      const errorResponse = new HttpErrorResponse({
+        error: {} as APIException,
+        status: 500
+      });
+      vi.mocked(bookService.updateBookReadStatus).mockReturnValue(throwError(() => errorResponse));
+
+      const items = service.getBulkReadActionsMenu(selectedBooks, mockUser);
+      const readStatusItems = items[0].items!;
+
+      readStatusItems[0].command!({} as any);
+
+      const confirmCall = vi.mocked(confirmationService.confirm).mock.calls[0][0];
+      confirmCall.accept!();
+
+      expect(messageService.add).toHaveBeenCalledWith({
+        severity: 'error',
+        summary: 'Update Failed',
+        detail: 'Could not update read status.',
+        life: 3000
+      });
+    });
+
+    it('should return only items for granted read permissions', () => {
+      const partialUser: User = {
+        ...mockUser,
+        permissions: {
+          ...mockUser.permissions,
+          canBulkResetBookReadStatus: true,
+          canBulkResetBookloreReadProgress: false,
+          canBulkResetKoReaderReadProgress: true
+        }
+      } as User;
+
+      const selectedBooks = new Set([1, 2]);
+      const items = service.getBulkReadActionsMenu(selectedBooks, partialUser);
+
+      expect(items).toHaveLength(2);
+      expect(items[0].label).toBe('Update Read Status');
+      expect(items[1].label).toBe('Reset KOReader Progress');
+    });
+
+    it('should not call bookService when confirmation is rejected', () => {
+      const selectedBooks = new Set([1, 2]);
+      const items = service.getBulkReadActionsMenu(selectedBooks, mockUser);
+
+      items[1].command!({} as any);
+
+      const confirmCall = vi.mocked(confirmationService.confirm).mock.calls[0][0];
+      confirmCall.reject?.();
+
+      expect(bookService.resetProgress).not.toHaveBeenCalled();
+      expect(loadingService.show).not.toHaveBeenCalled();
+    });
+  });
+});
+
diff --git a/booklore-ui/src/app/features/book/service/book-navigation.service.spec.ts b/booklore-ui/src/app/features/book/service/book-navigation.service.spec.ts
new file mode 100644
index 000000000..96945fbc3
--- /dev/null
+++ b/booklore-ui/src/app/features/book/service/book-navigation.service.spec.ts
@@ -0,0 +1,106 @@
+import {beforeEach, describe, expect, it} from 'vitest';
+import {firstValueFrom} from 'rxjs';
+import {BookNavigationService} from './book-navigation.service';
+
+describe('BookNavigationService', () => {
+  let service: BookNavigationService;
+  const bookIds = [10, 20, 30, 40];
+
+  beforeEach(() => {
+    service = new BookNavigationService();
+  });
+
+  it('should set and get available book ids', () => {
+    service.setAvailableBookIds(bookIds);
+    expect(service.getAvailableBookIds()).toEqual(bookIds);
+  });
+
+  it('should set navigation context and emit state', async () => {
+    service.setNavigationContext(bookIds, 30);
+
+    const state = await firstValueFrom(service.getNavigationState());
+
+    expect(state).not.toBeNull();
+    expect(state!.bookIds).toEqual(bookIds);
+    expect(state!.currentIndex).toBe(2);
+  });
+
+  it('should emit null if currentBookId not in bookIds', async () => {
+    service.setNavigationContext(bookIds, 99);
+
+    const state = await firstValueFrom(service.getNavigationState());
+
+    expect(state).toBeNull();
+  });
+
+  it('should determine canNavigatePrevious correctly', () => {
+    service.setNavigationContext(bookIds, 10);
+    expect(service.canNavigatePrevious()).toBe(false);
+
+    service.setNavigationContext(bookIds, 30);
+    expect(service.canNavigatePrevious()).toBe(true);
+  });
+
+  it('should determine canNavigateNext correctly', () => {
+    service.setNavigationContext(bookIds, 40);
+    expect(service.canNavigateNext()).toBe(false);
+
+    service.setNavigationContext(bookIds, 20);
+    expect(service.canNavigateNext()).toBe(true);
+  });
+
+  it('should get previous book id', () => {
+    service.setNavigationContext(bookIds, 30);
+    expect(service.getPreviousBookId()).toBe(20);
+
+    service.setNavigationContext(bookIds, 10);
+    expect(service.getPreviousBookId()).toBeNull();
+  });
+
+  it('should get next book id', () => {
+    service.setNavigationContext(bookIds, 20);
+    expect(service.getNextBookId()).toBe(30);
+
+    service.setNavigationContext(bookIds, 40);
+    expect(service.getNextBookId()).toBeNull();
+  });
+
+  it('should update current book and emit new index', async () => {
+    service.setNavigationContext(bookIds, 10);
+    service.updateCurrentBook(30);
+
+    const state = await firstValueFrom(service.getNavigationState());
+
+    expect(state!.currentIndex).toBe(2);
+    expect(state!.bookIds[state!.currentIndex]).toBe(30);
+  });
+
+  it('should not update current book if id not in list', async () => {
+    service.setNavigationContext(bookIds, 10);
+    service.updateCurrentBook(99);
+
+    const state = await firstValueFrom(service.getNavigationState());
+
+    expect(state!.currentIndex).toBe(0);
+    expect(state!.bookIds[state!.currentIndex]).toBe(10);
+  });
+
+  it('should return current position', () => {
+    service.setNavigationContext(bookIds, 30);
+    expect(service.getCurrentPosition()).toEqual({current: 3, total: 4});
+  });
+
+  it('should return null for current position if no state', () => {
+    expect(service.getCurrentPosition()).toBeNull();
+  });
+
+  it('should handle navigation methods gracefully if state is null', () => {
+    expect(service.canNavigatePrevious()).toBe(false);
+    expect(service.canNavigateNext()).toBe(false);
+    expect(service.getPreviousBookId()).toBeNull();
+    expect(service.getNextBookId()).toBeNull();
+
+    service.updateCurrentBook(10);
+    expect(service.getCurrentPosition()).toBeNull();
+  });
+});
diff --git a/booklore-ui/src/app/features/book/service/book-patch.service.spec.ts b/booklore-ui/src/app/features/book/service/book-patch.service.spec.ts
new file mode 100644
index 000000000..a64ca98af
--- /dev/null
+++ b/booklore-ui/src/app/features/book/service/book-patch.service.spec.ts
@@ -0,0 +1,173 @@
+import {beforeEach, describe, expect, it, vi} from 'vitest';
+import {TestBed} from '@angular/core/testing';
+import {EnvironmentInjector, runInInjectionContext} from '@angular/core';
+import {HttpClient, HttpParams} from '@angular/common/http';
+import {of, throwError} from 'rxjs';
+
+import {BookPatchService} from './book-patch.service';
+import {BookStateService} from './book-state.service';
+import {Book, ReadStatus} from '../model/book.model';
+
+describe('BookPatchService', () => {
+  let service: BookPatchService;
+  let httpMock: any;
+  let bookStateServiceMock: any;
+
+  const mockBooks: Book[] = [
+    {id: 1, bookType: 'PDF', libraryId: 1, libraryName: 'Lib', dateFinished: undefined} as Book,
+    {id: 2, bookType: 'EPUB', libraryId: 1, libraryName: 'Lib', dateFinished: undefined} as Book,
+  ];
+
+  beforeEach(() => {
+    httpMock = {
+      post: vi.fn(),
+      put: vi.fn(),
+    };
+    bookStateServiceMock = {
+      getCurrentBookState: vi.fn(),
+      updateBookState: vi.fn(),
+    };
+
+    TestBed.configureTestingModule({
+      providers: [
+        BookPatchService,
+        {provide: HttpClient, useValue: httpMock},
+        {provide: BookStateService, useValue: bookStateServiceMock},
+      ]
+    });
+
+    const injector = TestBed.inject(EnvironmentInjector);
+    service = runInInjectionContext(
+      injector,
+      () => TestBed.inject(BookPatchService)
+    );
+  });
+
+  it('should update book shelves and update state', () => {
+    const updatedBooks = [{...mockBooks[0], id: 1, libraryName: 'Updated'}];
+    httpMock.post.mockReturnValue(of(updatedBooks));
+    bookStateServiceMock.getCurrentBookState.mockReturnValue({books: [...mockBooks]});
+    service.updateBookShelves(new Set([1]), new Set([2]), new Set([3])).subscribe(result => {
+      expect(result).toEqual(updatedBooks);
+      expect(bookStateServiceMock.updateBookState).toHaveBeenCalledWith(expect.objectContaining({
+        books: expect.arrayContaining([expect.objectContaining({id: 1, libraryName: 'Updated'})])
+      }));
+    });
+  });
+
+  it('should save PDF progress', () => {
+    httpMock.post.mockReturnValue(of(void 0));
+    service.savePdfProgress(1, 10, 0.5).subscribe(result => {
+      expect(result).toBeUndefined();
+      expect(httpMock.post).toHaveBeenCalledWith(expect.stringContaining('/progress'), {
+        bookId: 1,
+        pdfProgress: {page: 10, percentage: 0.5}
+      });
+    });
+  });
+
+  it('should save EPUB progress', () => {
+    httpMock.post.mockReturnValue(of(void 0));
+    service.saveEpubProgress(2, 'cfi123', 0.8).subscribe(result => {
+      expect(result).toBeUndefined();
+      expect(httpMock.post).toHaveBeenCalledWith(expect.stringContaining('/progress'), {
+        bookId: 2,
+        epubProgress: {cfi: 'cfi123', percentage: 0.8}
+      });
+    });
+  });
+
+  it('should save CBX progress', () => {
+    httpMock.post.mockReturnValue(of(void 0));
+    service.saveCbxProgress(3, 5, 0.2).subscribe(result => {
+      expect(result).toBeUndefined();
+      expect(httpMock.post).toHaveBeenCalledWith(expect.stringContaining('/progress'), {
+        bookId: 3,
+        cbxProgress: {page: 5, percentage: 0.2}
+      });
+    });
+  });
+
+  it('should update date finished and update state', () => {
+    httpMock.post.mockReturnValue(of(void 0));
+    bookStateServiceMock.getCurrentBookState.mockReturnValue({books: [...mockBooks]});
+    service.updateDateFinished(1, '2023-01-01').subscribe(() => {
+      expect(bookStateServiceMock.updateBookState).toHaveBeenCalledWith(expect.objectContaining({
+        books: expect.arrayContaining([expect.objectContaining({id: 1, dateFinished: '2023-01-01'})])
+      }));
+    });
+  });
+
+  it('should reset progress and update state', () => {
+    const responses = [{bookId: 1, readStatus: ReadStatus.UNREAD, readStatusModifiedTime: 'now', dateFinished: undefined}];
+    httpMock.post.mockReturnValue(of(responses));
+    bookStateServiceMock.getCurrentBookState.mockReturnValue({books: [...mockBooks]});
+    service.resetProgress([1], 'BOOKLORE').subscribe(result => {
+      expect(result).toEqual(responses);
+      expect(httpMock.post).toHaveBeenCalledWith(
+        expect.stringContaining('/reset-progress'),
+        [1],
+        {params: expect.any(HttpParams)}
+      );
+      expect(bookStateServiceMock.updateBookState).toHaveBeenCalled();
+    });
+  });
+
+  it('should update book read status and update state', () => {
+    const responses = [{bookId: 2, readStatus: ReadStatus.READING, readStatusModifiedTime: 'now', dateFinished: '2023-01-01'}];
+    httpMock.post.mockReturnValue(of(responses));
+    bookStateServiceMock.getCurrentBookState.mockReturnValue({books: [...mockBooks]});
+    service.updateBookReadStatus([2], ReadStatus.READING).subscribe(result => {
+      expect(result).toEqual(responses);
+      expect(httpMock.post).toHaveBeenCalledWith(
+        expect.stringContaining('/status'),
+        {bookIds: [2], status: ReadStatus.READING}
+      );
+      expect(bookStateServiceMock.updateBookState).toHaveBeenCalled();
+    });
+  });
+
+  it('should reset personal rating and update state', () => {
+    const responses = [{bookId: 1, personalRating: null}];
+    httpMock.post.mockReturnValue(of(responses));
+    bookStateServiceMock.getCurrentBookState.mockReturnValue({books: [...mockBooks]});
+    service.resetPersonalRating([1]).subscribe(result => {
+      expect(result).toEqual(responses);
+      expect(httpMock.post).toHaveBeenCalledWith(expect.stringContaining('/reset-personal-rating'), [1]);
+      expect(bookStateServiceMock.updateBookState).toHaveBeenCalled();
+    });
+  });
+
+  it('should update personal rating and update state', () => {
+    const responses = [{bookId: 2, personalRating: 5}];
+    httpMock.put.mockReturnValue(of(responses));
+    bookStateServiceMock.getCurrentBookState.mockReturnValue({books: [...mockBooks]});
+    service.updatePersonalRating([2], 5).subscribe(result => {
+      expect(result).toEqual(responses);
+      expect(httpMock.put).toHaveBeenCalledWith(expect.stringContaining('/personal-rating'), {ids: [2], rating: 5});
+      expect(bookStateServiceMock.updateBookState).toHaveBeenCalled();
+    });
+  });
+
+  it('should update last read time in state', () => {
+    const now = new Date().toISOString();
+    vi.useFakeTimers().setSystemTime(new Date(now));
+    bookStateServiceMock.getCurrentBookState.mockReturnValue({books: [...mockBooks]});
+    service.updateLastReadTime(1);
+    expect(bookStateServiceMock.updateBookState).toHaveBeenCalledWith(expect.objectContaining({
+      books: expect.arrayContaining([expect.objectContaining({id: 1, lastReadTime: now})])
+    }));
+    vi.useRealTimers();
+  });
+
+  it('should handle errors from http.post gracefully', () => {
+    httpMock.post.mockReturnValue(throwError(() => new Error('fail')));
+    service.savePdfProgress(1, 1, 1).subscribe({
+      error: (err: any) => {
+        expect(err).toBeInstanceOf(Error);
+        expect(err.message).toBe('fail');
+      }
+    });
+  });
+});
+
diff --git a/booklore-ui/src/app/features/book/service/book-state.service.ts b/booklore-ui/src/app/features/book/service/book-state.service.ts
index 114849374..dcf134f7a 100644
--- a/booklore-ui/src/app/features/book/service/book-state.service.ts
+++ b/booklore-ui/src/app/features/book/service/book-state.service.ts
@@ -1,5 +1,5 @@
 import {Injectable} from '@angular/core';
-import {BehaviorSubject, Observable} from 'rxjs';
+import {BehaviorSubject} from 'rxjs';
 import {BookState} from '../model/state/book-state.model';
 
 @Injectable({
@@ -22,13 +22,6 @@ export class BookStateService {
     this.bookStateSubject.next(state);
   }
 
-  updatePartialBookState(partialState: Partial<BookState>): void {
-    this.bookStateSubject.next({
-      ...this.bookStateSubject.value,
-      ...partialState
-    });
-  }
-
   resetBookState(): void {
     this.bookStateSubject.next({
       books: null,
diff --git a/booklore-ui/src/app/features/book/service/book.service.spec.ts b/booklore-ui/src/app/features/book/service/book.service.spec.ts
new file mode 100644
index 000000000..7c83de699
--- /dev/null
+++ b/booklore-ui/src/app/features/book/service/book.service.spec.ts
@@ -0,0 +1,537 @@
+import {beforeEach, describe, expect, it, vi} from 'vitest';
+import {TestBed} from '@angular/core/testing';
+import {EnvironmentInjector, runInInjectionContext} from '@angular/core';
+import {HttpClient} from '@angular/common/http';
+import {firstValueFrom, of, throwError} from 'rxjs';
+import {BookService} from './book.service';
+import {BookStateService} from './book-state.service';
+import {BookSocketService} from './book-socket.service';
+import {BookPatchService} from './book-patch.service';
+import {MessageService} from 'primeng/api';
+import {AuthService} from '../../../shared/service/auth.service';
+import {FileDownloadService} from '../../../shared/service/file-download.service';
+import {Router} from '@angular/router';
+import {AdditionalFileType, Book, BookMetadata, ReadStatus} from '../model/book.model';
+import {FetchMetadataRequest} from '../../metadata/model/request/fetch-metadata-request.model';
+
+describe('BookService', () => {
+  let service: BookService;
+  let httpMock: any;
+  let messageServiceMock: any;
+  let authServiceMock: any;
+  let fileDownloadServiceMock: any;
+  let routerMock: any;
+  let bookStateServiceMock: any;
+  let bookSocketServiceMock: any;
+  let bookPatchServiceMock: any;
+
+  beforeEach(() => {
+    httpMock = {
+      get: vi.fn(),
+      post: vi.fn(),
+      put: vi.fn(),
+      delete: vi.fn()
+    };
+    messageServiceMock = {add: vi.fn()};
+    authServiceMock = {token$: of('token')};
+    fileDownloadServiceMock = {downloadFile: vi.fn()};
+    routerMock = {navigate: vi.fn()};
+    bookStateServiceMock = {
+      bookState$: of({books: [{id: 1, bookType: 'PDF', shelves: [], metadata: {seriesName: 'S'}}], loaded: true, error: null}),
+      getCurrentBookState: vi.fn(),
+      updateBookState: vi.fn(),
+      resetBookState: vi.fn()
+    };
+    bookSocketServiceMock = {
+      handleNewlyCreatedBook: vi.fn(),
+      handleRemovedBookIds: vi.fn(),
+      handleBookUpdate: vi.fn(),
+      handleMultipleBookUpdates: vi.fn(),
+      handleBookMetadataUpdate: vi.fn(),
+      handleMultipleBookCoverPatches: vi.fn()
+    };
+    bookPatchServiceMock = {
+      updateBookShelves: vi.fn(),
+      updateLastReadTime: vi.fn(),
+      savePdfProgress: vi.fn(),
+      saveEpubProgress: vi.fn(),
+      saveCbxProgress: vi.fn(),
+      updateDateFinished: vi.fn(),
+      resetProgress: vi.fn(),
+      updateBookReadStatus: vi.fn(),
+      resetPersonalRating: vi.fn(),
+      updatePersonalRating: vi.fn()
+    };
+
+    bookStateServiceMock.getCurrentBookState.mockReturnValue({
+      books: [
+        {id: 1, bookType: 'PDF', shelves: [{id: 10}], metadata: {seriesName: 'S'}, alternativeFormats: [], supplementaryFiles: [], fileName: 'file.pdf'},
+        {id: 2, bookType: 'EPUB', shelves: [], metadata: {}, alternativeFormats: [], supplementaryFiles: [], fileName: 'file2.epub'}
+      ],
+      loaded: true,
+      error: null
+    });
+
+    TestBed.configureTestingModule({
+      providers: [
+        BookService,
+        {provide: HttpClient, useValue: httpMock},
+        {provide: MessageService, useValue: messageServiceMock},
+        {provide: AuthService, useValue: authServiceMock},
+        {provide: FileDownloadService, useValue: fileDownloadServiceMock},
+        {provide: Router, useValue: routerMock},
+        {provide: BookStateService, useValue: bookStateServiceMock},
+        {provide: BookSocketService, useValue: bookSocketServiceMock},
+        {provide: BookPatchService, useValue: bookPatchServiceMock}
+      ]
+    });
+
+    const injector = TestBed.inject(EnvironmentInjector);
+    service = runInInjectionContext(injector, () => TestBed.inject(BookService));
+  });
+
+  describe('State Management', () => {
+    it('should get current book state', () => {
+      expect(service.getCurrentBookState()).toEqual(bookStateServiceMock.getCurrentBookState());
+    });
+
+    it('should fetch books and update state', async () => {
+      const books = [{id: 1}];
+      httpMock.get.mockReturnValue(of(books));
+      await firstValueFrom(service['fetchBooks']());
+      expect(bookStateServiceMock.updateBookState).toHaveBeenCalledWith({
+        books,
+        loaded: true,
+        error: null
+      });
+    });
+
+    it('should handle fetchBooks error', async () => {
+      httpMock.get.mockReturnValue(throwError(() => ({message: 'fail'})));
+      bookStateServiceMock.getCurrentBookState.mockReturnValue({books: [], loaded: false, error: null});
+      await expect(firstValueFrom(service['fetchBooks']())).rejects.toBeTruthy();
+      expect(bookStateServiceMock.updateBookState).toHaveBeenCalledWith({
+        books: [],
+        loaded: true,
+        error: 'fail'
+      });
+    });
+
+    it('should refreshBooks and update state', () => {
+      httpMock.get.mockReturnValue(of([{id: 1}]));
+      service.refreshBooks();
+      expect(bookStateServiceMock.updateBookState).toHaveBeenCalledWith({
+        books: [{id: 1}],
+        loaded: true,
+        error: null
+      });
+    });
+
+    it('should handle refreshBooks error', () => {
+      httpMock.get.mockReturnValue(throwError(() => ({message: 'fail'})));
+      service.refreshBooks();
+      expect(bookStateServiceMock.updateBookState).toHaveBeenCalledWith({
+        books: null,
+        loaded: true,
+        error: 'fail'
+      });
+    });
+
+    it('should remove books by library id', () => {
+      bookStateServiceMock.getCurrentBookState.mockReturnValue({
+        books: [{id: 1, libraryId: 2}, {id: 2, libraryId: 3}],
+        loaded: true,
+        error: null
+      });
+      service.removeBooksByLibraryId(2);
+      expect(bookStateServiceMock.updateBookState).toHaveBeenCalledWith({
+        books: [{id: 2, libraryId: 3}],
+        loaded: true,
+        error: null
+      });
+    });
+
+    it('should remove books from shelf', () => {
+      bookStateServiceMock.getCurrentBookState.mockReturnValue({
+        books: [{id: 1, shelves: [{id: 10}, {id: 20}]}, {id: 2, shelves: [{id: 20}]}],
+        loaded: true,
+        error: null
+      });
+      service.removeBooksFromShelf(20);
+      expect(bookStateServiceMock.updateBookState).toHaveBeenCalled();
+    });
+  });
+
+  describe('Book Retrieval', () => {
+    it('should get book by id from state', () => {
+      expect(service.getBookByIdFromState(1)).toEqual(expect.objectContaining({id: 1}));
+      expect(service.getBookByIdFromState(999)).toBeUndefined();
+    });
+
+    it('should get books by ids from state', () => {
+      expect(service.getBooksByIdsFromState([1, 2])).toHaveLength(2);
+      expect(service.getBooksByIdsFromState([])).toEqual([]);
+    });
+
+    it('should get book by id from API', async () => {
+      httpMock.get.mockReturnValue(of({id: 1}));
+      const result = await firstValueFrom(service.getBookByIdFromAPI(1, true));
+      expect(result).toEqual({id: 1});
+    });
+
+    it('should get books in series', async () => {
+      const result = await firstValueFrom(service.getBooksInSeries(1));
+      expect(result).toEqual([expect.objectContaining({id: 1})]);
+    });
+
+    it('should get book recommendations', async () => {
+      httpMock.get.mockReturnValue(of([{id: 1}]));
+      const result = await firstValueFrom(service.getBookRecommendations(1));
+      expect(result).toEqual([{id: 1}]);
+    });
+  });
+
+  describe('Book Operations', () => {
+    it('should delete books and update state', async () => {
+      httpMock.delete.mockReturnValue(of({failedFileDeletions: []}));
+      bookStateServiceMock.getCurrentBookState.mockReturnValue({
+        books: [{id: 1}, {id: 2}],
+        loaded: true,
+        error: null
+      });
+      await firstValueFrom(service.deleteBooks(new Set([1])));
+      expect(bookStateServiceMock.updateBookState).toHaveBeenCalled();
+      expect(messageServiceMock.add).toHaveBeenCalledWith(expect.objectContaining({severity: 'success'}));
+    });
+
+    it('should show warning if some files could not be deleted', async () => {
+      httpMock.delete.mockReturnValue(of({failedFileDeletions: ['file.pdf']}));
+      bookStateServiceMock.getCurrentBookState.mockReturnValue({
+        books: [{id: 1, fileName: 'file.pdf'}],
+        loaded: true,
+        error: null
+      });
+      await firstValueFrom(service.deleteBooks(new Set([1])));
+      expect(messageServiceMock.add).toHaveBeenCalledWith(expect.objectContaining({severity: 'warn'}));
+    });
+
+    it('should handle deleteBooks error', async () => {
+      httpMock.delete.mockReturnValue(throwError(() => ({error: {message: 'fail'}})));
+      await expect(firstValueFrom(service.deleteBooks(new Set([1])))).rejects.toBeTruthy();
+      expect(messageServiceMock.add).toHaveBeenCalledWith(expect.objectContaining({severity: 'error'}));
+    });
+
+    it('should update book shelves', async () => {
+      bookPatchServiceMock.updateBookShelves.mockReturnValue(of([{id: 1}]));
+      const result = await firstValueFrom(service.updateBookShelves(new Set([1]), new Set([2]), new Set([3])));
+      expect(result).toEqual([{id: 1}]);
+    });
+
+    it('should handle updateBookShelves error', async () => {
+      bookPatchServiceMock.updateBookShelves.mockReturnValue(throwError(() => ({message: 'fail'})));
+      await expect(firstValueFrom(service.updateBookShelves(new Set([1]), new Set([2]), new Set([3])))).rejects.toBeTruthy();
+      expect(bookStateServiceMock.updateBookState).toHaveBeenCalled();
+    });
+  });
+
+  describe('Reading & Viewer Settings', () => {
+    it('should navigate to correct reader and update last read time', () => {
+      service.readBook(1, 'ngx');
+      expect(routerMock.navigate).toHaveBeenCalledWith(['/pdf-reader/book/1']);
+      expect(bookPatchServiceMock.updateLastReadTime).toHaveBeenCalledWith(1);
+    });
+
+    it('should not navigate if book not found', () => {
+      bookStateServiceMock.getCurrentBookState.mockReturnValue({books: [], loaded: true, error: null});
+      service.readBook(999, 'ngx');
+      expect(routerMock.navigate).not.toHaveBeenCalled();
+    });
+
+    it('should get book setting', async () => {
+      httpMock.get.mockReturnValue(of({fontSize: 12}));
+      const result = await firstValueFrom(service.getBookSetting(1));
+      expect(result).toEqual({fontSize: 12});
+    });
+
+    it('should update viewer setting', async () => {
+      httpMock.put.mockReturnValue(of(void 0));
+      const result = await firstValueFrom(service.updateViewerSetting({fontSize: 12}, 1));
+      expect(result).toBeUndefined();
+    });
+  });
+
+  describe('File Operations', () => {
+    it('should get file content', async () => {
+      httpMock.get.mockReturnValue(of(new Blob(['abc'])));
+      const result = await firstValueFrom(service.getFileContent(1));
+      expect(result).toBeInstanceOf(Blob);
+    });
+
+    it('should download file', () => {
+      const book = {id: 1, fileName: 'file.pdf'};
+      service.downloadFile(book as Book);
+      expect(fileDownloadServiceMock.downloadFile).toHaveBeenCalled();
+    });
+
+    it('should delete additional file and update state', async () => {
+      httpMock.delete.mockReturnValue(of(void 0));
+      bookStateServiceMock.getCurrentBookState.mockReturnValue({
+        books: [{id: 1, alternativeFormats: [{id: 2}], supplementaryFiles: [{id: 3}]}],
+        loaded: true,
+        error: null
+      });
+      await firstValueFrom(service.deleteAdditionalFile(1, 2));
+      expect(bookStateServiceMock.updateBookState).toHaveBeenCalled();
+      expect(messageServiceMock.add).toHaveBeenCalledWith(expect.objectContaining({severity: 'success'}));
+    });
+
+    it('should handle deleteAdditionalFile error', async () => {
+      httpMock.delete.mockReturnValue(throwError(() => ({error: {message: 'fail'}})));
+      await expect(firstValueFrom(service.deleteAdditionalFile(1, 2))).rejects.toBeTruthy();
+      expect(messageServiceMock.add).toHaveBeenCalledWith(expect.objectContaining({severity: 'error'}));
+    });
+
+    it('should upload additional file and update state', async () => {
+      httpMock.post.mockReturnValue(of({id: 2}));
+      bookStateServiceMock.getCurrentBookState.mockReturnValue({
+        books: [{id: 1, alternativeFormats: [], supplementaryFiles: []}],
+        loaded: true,
+        error: null
+      });
+      const file = new File(['abc'], 'file.txt');
+      await firstValueFrom(service.uploadAdditionalFile(1, file, AdditionalFileType.ALTERNATIVE_FORMAT));
+      expect(bookStateServiceMock.updateBookState).toHaveBeenCalled();
+      expect(messageServiceMock.add).toHaveBeenCalledWith(expect.objectContaining({severity: 'success'}));
+    });
+
+    it('should handle uploadAdditionalFile error', async () => {
+      httpMock.post.mockReturnValue(throwError(() => ({error: {message: 'fail'}})));
+      const file = new File(['abc'], 'file.txt');
+      await expect(firstValueFrom(service.uploadAdditionalFile(1, file, AdditionalFileType.ALTERNATIVE_FORMAT))).rejects.toBeTruthy();
+      expect(messageServiceMock.add).toHaveBeenCalledWith(expect.objectContaining({severity: 'error'}));
+    });
+
+    it('should download additional file', () => {
+      const book = {id: 1, alternativeFormats: [{id: 2, fileName: 'f.txt'}]};
+      service.downloadAdditionalFile(book as Book, 2);
+      expect(fileDownloadServiceMock.downloadFile).toHaveBeenCalled();
+    });
+  });
+
+  describe('Progress & Status Tracking', () => {
+    it('should update last read time', () => {
+      service.updateLastReadTime(1);
+      expect(bookPatchServiceMock.updateLastReadTime).toHaveBeenCalledWith(1);
+    });
+
+    it('should save pdf progress', async () => {
+      bookPatchServiceMock.savePdfProgress.mockReturnValue(of(void 0));
+      const result = await firstValueFrom(service.savePdfProgress(1, 2, 0.5));
+      expect(result).toBeUndefined();
+    });
+
+    it('should save epub progress', async () => {
+      bookPatchServiceMock.saveEpubProgress.mockReturnValue(of(void 0));
+      const result = await firstValueFrom(service.saveEpubProgress(1, 'cfi', 0.5));
+      expect(result).toBeUndefined();
+    });
+
+    it('should save cbx progress', async () => {
+      bookPatchServiceMock.saveCbxProgress.mockReturnValue(of(void 0));
+      const result = await firstValueFrom(service.saveCbxProgress(1, 2, 0.5));
+      expect(result).toBeUndefined();
+    });
+
+    it('should update date finished', async () => {
+      bookPatchServiceMock.updateDateFinished.mockReturnValue(of(void 0));
+      const result = await firstValueFrom(service.updateDateFinished(1, '2020-01-01'));
+      expect(result).toBeUndefined();
+    });
+
+    it('should reset progress', async () => {
+      bookPatchServiceMock.resetProgress.mockReturnValue(of([{bookId: 1, readStatus: ReadStatus.READ, readStatusModifiedTime: ''}]));
+      const result = await firstValueFrom(service.resetProgress([1], 'BOOKLORE'));
+      expect(result).toEqual([{bookId: 1, readStatus: ReadStatus.READ, readStatusModifiedTime: ''}]);
+    });
+
+    it('should update book read status', async () => {
+      bookPatchServiceMock.updateBookReadStatus.mockReturnValue(of([{bookId: 1, readStatus: ReadStatus.READ, readStatusModifiedTime: ''}]));
+      const result = await firstValueFrom(service.updateBookReadStatus([1], ReadStatus.READ));
+      expect(result).toEqual([{bookId: 1, readStatus: ReadStatus.READ, readStatusModifiedTime: ''}]);
+    });
+  });
+
+  describe('Personal Rating', () => {
+    it('should reset personal rating', async () => {
+      bookPatchServiceMock.resetPersonalRating.mockReturnValue(of([{bookId: 1}]));
+      const result = await firstValueFrom(service.resetPersonalRating([1]));
+      expect(result).toEqual([{bookId: 1}]);
+    });
+
+    it('should update personal rating', async () => {
+      bookPatchServiceMock.updatePersonalRating.mockReturnValue(of([{bookId: 1, personalRating: 5}]));
+      const result = await firstValueFrom(service.updatePersonalRating([1], 5));
+      expect(result).toEqual([{bookId: 1, personalRating: 5}]);
+    });
+  });
+
+  describe('Metadata Operations', () => {
+    it('should fetch book metadata', async () => {
+      httpMock.post.mockReturnValue(of([{bookId: 1}]));
+      const req: FetchMetadataRequest = {
+        bookId: 1,
+        providers: [],
+        title: '',
+        author: '',
+        isbn: ''
+      };
+      const result = await firstValueFrom(service.fetchBookMetadata(1, req));
+      expect(result).toEqual([{bookId: 1}]);
+    });
+
+    it('should update book metadata', async () => {
+      httpMock.put.mockReturnValue(of({bookId: 1}));
+      service.handleBookMetadataUpdate = vi.fn();
+      const result = await firstValueFrom(service.updateBookMetadata(1, {} as any, true));
+      expect(result).toEqual({bookId: 1});
+      expect(service.handleBookMetadataUpdate).toHaveBeenCalledWith(1, {bookId: 1});
+    });
+
+    it('should update books metadata', async () => {
+      httpMock.put.mockReturnValue(of(void 0));
+      const result = await firstValueFrom(service.updateBooksMetadata({} as any));
+      expect(result).toBeUndefined();
+    });
+
+    it('should toggle all lock', async () => {
+      httpMock.put.mockReturnValue(of([{bookId: 1}]));
+      bookStateServiceMock.getCurrentBookState.mockReturnValue({
+        books: [{id: 1, metadata: {bookId: 1}}],
+        loaded: true,
+        error: null
+      });
+      const result = await firstValueFrom(service.toggleAllLock(new Set([1]), 'lock'));
+      expect(result).toBeUndefined();
+      expect(bookStateServiceMock.updateBookState).toHaveBeenCalled();
+    });
+
+    it('should handle toggle all lock error', async () => {
+      httpMock.put.mockReturnValue(throwError(() => ({message: 'fail'})));
+      await expect(firstValueFrom(service.toggleAllLock(new Set([1]), 'lock'))).rejects.toBeTruthy();
+    });
+
+    it('should toggle field locks', async () => {
+      httpMock.put.mockReturnValue(of(void 0));
+      bookStateServiceMock.getCurrentBookState.mockReturnValue({
+        books: [{id: 1, metadata: {}}],
+        loaded: true,
+        error: null
+      });
+      const result = await firstValueFrom(service.toggleFieldLocks([1], {title: 'LOCK'}));
+      expect(result).toBeUndefined();
+      expect(bookStateServiceMock.updateBookState).toHaveBeenCalled();
+    });
+
+    it('should handle toggle field locks error', async () => {
+      httpMock.put.mockReturnValue(throwError(() => ({message: 'fail'})));
+      await expect(firstValueFrom(service.toggleFieldLocks([1], {title: 'LOCK'}))).rejects.toBeTruthy();
+      expect(messageServiceMock.add).toHaveBeenCalledWith(expect.objectContaining({severity: 'error'}));
+    });
+
+    it('should consolidate metadata', async () => {
+      httpMock.post.mockReturnValue(of({}));
+      service.refreshBooks = vi.fn();
+      await firstValueFrom(service.consolidateMetadata('authors', ['a'], ['b']));
+      expect(service.refreshBooks).toHaveBeenCalled();
+    });
+
+    it('should delete metadata', async () => {
+      httpMock.post.mockReturnValue(of({}));
+      service.refreshBooks = vi.fn();
+      await firstValueFrom(service.deleteMetadata('authors', ['a']));
+      expect(service.refreshBooks).toHaveBeenCalled();
+    });
+  });
+
+  describe('Cover Operations', () => {
+    it('should get upload cover url', () => {
+      expect(service.getUploadCoverUrl(1)).toContain('/1/metadata/cover/upload');
+    });
+
+    it('should upload cover from url and handleBookMetadataUpdate', async () => {
+      httpMock.post.mockReturnValue(of({bookId: 1}));
+      service.handleBookMetadataUpdate = vi.fn();
+      const result = await firstValueFrom(service.uploadCoverFromUrl(1, 'url'));
+      expect(result).toEqual({bookId: 1});
+      expect(service.handleBookMetadataUpdate).toHaveBeenCalledWith(1, {bookId: 1});
+    });
+
+    it('should regenerate covers', async () => {
+      httpMock.post.mockReturnValue(of(void 0));
+      const result = await firstValueFrom(service.regenerateCovers());
+      expect(result).toBeUndefined();
+    });
+
+    it('should regenerate cover', async () => {
+      httpMock.post.mockReturnValue(of(void 0));
+      const result = await firstValueFrom(service.regenerateCover(1));
+      expect(result).toBeUndefined();
+    });
+
+    it('should generate custom cover', async () => {
+      httpMock.post.mockReturnValue(of(void 0));
+      const result = await firstValueFrom(service.generateCustomCover(1));
+      expect(result).toBeUndefined();
+    });
+
+    it('should regenerate covers for books', async () => {
+      httpMock.post.mockReturnValue(of(void 0));
+      const result = await firstValueFrom(service.regenerateCoversForBooks([1, 2]));
+      expect(result).toBeUndefined();
+    });
+
+    it('should bulk upload cover', async () => {
+      httpMock.post.mockReturnValue(of(void 0));
+      const file = new File(['abc'], 'cover.jpg');
+      const result = await firstValueFrom(service.bulkUploadCover([1, 2], file));
+      expect(result).toBeUndefined();
+    });
+  });
+
+  describe('Websocket Handlers', () => {
+    it('should handle newly created book', () => {
+      const book = {id: 1};
+      service.handleNewlyCreatedBook(book as Book);
+      expect(bookSocketServiceMock.handleNewlyCreatedBook).toHaveBeenCalledWith(book);
+    });
+
+    it('should handle removed book ids', () => {
+      service.handleRemovedBookIds([1, 2]);
+      expect(bookSocketServiceMock.handleRemovedBookIds).toHaveBeenCalledWith([1, 2]);
+    });
+
+    it('should handle book update', () => {
+      const book = {id: 1};
+      service.handleBookUpdate(book as Book);
+      expect(bookSocketServiceMock.handleBookUpdate).toHaveBeenCalledWith(book);
+    });
+
+    it('should handle multiple book updates', () => {
+      const books = [{id: 1}, {id: 2}];
+      service.handleMultipleBookUpdates(books as Book[]);
+      expect(bookSocketServiceMock.handleMultipleBookUpdates).toHaveBeenCalledWith(books);
+    });
+
+    it('should handle book metadata update', () => {
+      service.handleBookMetadataUpdate(1, {bookId: 1} as BookMetadata);
+      expect(bookSocketServiceMock.handleBookMetadataUpdate).toHaveBeenCalledWith(1, {bookId: 1});
+    });
+
+    it('should handle multiple book cover patches', () => {
+      const patches = [{id: 1, coverUpdatedOn: 'now'}];
+      service.handleMultipleBookCoverPatches(patches);
+      expect(bookSocketServiceMock.handleMultipleBookCoverPatches).toHaveBeenCalledWith(patches);
+    });
+  });
+});
+
diff --git a/booklore-ui/src/app/features/book/service/cbx-reader.service.spec.ts b/booklore-ui/src/app/features/book/service/cbx-reader.service.spec.ts
new file mode 100644
index 000000000..10654f131
--- /dev/null
+++ b/booklore-ui/src/app/features/book/service/cbx-reader.service.spec.ts
@@ -0,0 +1,96 @@
+import {beforeEach, describe, expect, it, vi} from 'vitest';
+import {TestBed} from '@angular/core/testing';
+import {EnvironmentInjector, runInInjectionContext} from '@angular/core';
+import {HttpClient} from '@angular/common/http';
+import {of, throwError} from 'rxjs';
+
+import {CbxReaderService} from './cbx-reader.service';
+import {AuthService} from '../../../shared/service/auth.service';
+
+describe('CbxReaderService', () => {
+  let service: CbxReaderService;
+  let httpClientMock: any;
+  let authServiceMock: any;
+
+  beforeEach(() => {
+    httpClientMock = {
+      get: vi.fn()
+    };
+
+    authServiceMock = {
+      getOidcAccessToken: vi.fn(),
+      getInternalAccessToken: vi.fn()
+    };
+
+    TestBed.configureTestingModule({
+      providers: [
+        CbxReaderService,
+        {provide: HttpClient, useValue: httpClientMock},
+        {provide: AuthService, useValue: authServiceMock}
+      ]
+    });
+
+    const injector = TestBed.inject(EnvironmentInjector);
+
+    service = runInInjectionContext(
+      injector,
+      () => TestBed.inject(CbxReaderService)
+    );
+  });
+
+  it('should get available pages with token', () => {
+    authServiceMock.getOidcAccessToken.mockReturnValue('abc123');
+    authServiceMock.getInternalAccessToken.mockReturnValue(null);
+    httpClientMock.get.mockReturnValue(of([1, 2, 3]));
+    service.getAvailablePages(42).subscribe(pages => {
+      expect(pages).toEqual([1, 2, 3]);
+      expect(httpClientMock.get).toHaveBeenCalledWith(expect.stringContaining('token=abc123'));
+    });
+  });
+
+  it('should get available pages without token', () => {
+    authServiceMock.getOidcAccessToken.mockReturnValue(null);
+    authServiceMock.getInternalAccessToken.mockReturnValue(null);
+    httpClientMock.get.mockReturnValue(of([4, 5]));
+    service.getAvailablePages(99).subscribe(pages => {
+      expect(pages).toEqual([4, 5]);
+      expect(httpClientMock.get).toHaveBeenCalledWith(expect.not.stringContaining('token='));
+    });
+  });
+
+  it('should handle error when getting available pages', () => {
+    authServiceMock.getOidcAccessToken.mockReturnValue('tok');
+    httpClientMock.get.mockReturnValue(throwError(() => new Error('fail')));
+    service.getAvailablePages(1).subscribe({
+      error: (err: any) => {
+        expect(err).toBeInstanceOf(Error);
+        expect(err.message).toBe('fail');
+      }
+    });
+  });
+
+  it('should return correct page image url with oidc token', () => {
+    authServiceMock.getOidcAccessToken.mockReturnValue('tok');
+    authServiceMock.getInternalAccessToken.mockReturnValue(null);
+    const url = service.getPageImageUrl(5, 7);
+    expect(url).toContain('/api/v1/media/book/5/cbx/pages/7');
+    expect(url).toContain('token=tok');
+  });
+
+  it('should return correct page image url with internal token', () => {
+    authServiceMock.getOidcAccessToken.mockReturnValue(null);
+    authServiceMock.getInternalAccessToken.mockReturnValue('inttok');
+    const url = service.getPageImageUrl(8, 2);
+    expect(url).toContain('/api/v1/media/book/8/cbx/pages/2');
+    expect(url).toContain('token=inttok');
+  });
+
+  it('should return correct page image url without token', () => {
+    authServiceMock.getOidcAccessToken.mockReturnValue(null);
+    authServiceMock.getInternalAccessToken.mockReturnValue(null);
+    const url = service.getPageImageUrl(3, 1);
+    expect(url).toContain('/api/v1/media/book/3/cbx/pages/1');
+    expect(url).not.toContain('token=');
+  });
+});
+
diff --git a/booklore-ui/src/app/features/book/service/library-shelf-menu.service.spec.ts b/booklore-ui/src/app/features/book/service/library-shelf-menu.service.spec.ts
new file mode 100644
index 000000000..449efcbd6
--- /dev/null
+++ b/booklore-ui/src/app/features/book/service/library-shelf-menu.service.spec.ts
@@ -0,0 +1,350 @@
+import {TestBed} from '@angular/core/testing';
+import {EnvironmentInjector, runInInjectionContext} from '@angular/core';
+import {ConfirmationService, MessageService} from 'primeng/api';
+import {Router} from '@angular/router';
+import {LibraryService} from './library.service';
+import {ShelfService} from './shelf.service';
+import {TaskHelperService} from '../../settings/task-management/task-helper.service';
+import {DialogLauncherService} from '../../../shared/services/dialog-launcher.service';
+import {MagicShelf, MagicShelfService} from '../../magic-shelf/service/magic-shelf.service';
+import {UserService} from "../../settings/user-management/user.service";
+import {LoadingService} from '../../../core/services/loading.service';
+import {LibraryShelfMenuService} from './library-shelf-menu.service';
+import {Library} from '../model/library.model';
+import {Shelf} from '../model/shelf.model';
+import {MetadataRefreshType} from '../../metadata/model/request/metadata-refresh-type.enum';
+import {of, throwError} from 'rxjs';
+import {beforeEach, describe, expect, it, vi} from 'vitest';
+
+describe('LibraryShelfMenuService', () => {
+  let service: LibraryShelfMenuService;
+  let confirmationService: any;
+  let messageService: any;
+  let libraryService: any;
+  let shelfService: any;
+  let taskHelperService: any;
+  let router: any;
+  let dialogLauncherService: any;
+  let magicShelfService: any;
+  let userService: any;
+  let loadingService: any;
+
+  const mockLibrary: Library = {id: 1, name: 'Lib1'} as Library;
+  const mockShelf: Shelf = {id: 2, name: 'Shelf1'} as Shelf;
+  const mockMagicShelf: MagicShelf = {id: 3, name: 'Magic1', isPublic: false} as MagicShelf;
+
+  beforeEach(() => {
+    confirmationService = {confirm: vi.fn()};
+    messageService = {add: vi.fn()};
+    libraryService = {
+      refreshLibrary: vi.fn(),
+      deleteLibrary: vi.fn()
+    };
+    shelfService = {
+      deleteShelf: vi.fn()
+    };
+    taskHelperService = {
+      refreshMetadataTask: vi.fn()
+    };
+    router = {navigate: vi.fn()};
+    dialogLauncherService = {
+      openLibraryEditDialog: vi.fn(),
+      openLibraryMetadataFetchDialog: vi.fn(),
+      openShelfEditDialog: vi.fn(),
+      openMagicShelfEditDialog: vi.fn()
+    };
+    magicShelfService = {
+      deleteShelf: vi.fn()
+    };
+    userService = {
+      getCurrentUser: vi.fn()
+    };
+    loadingService = {
+      show: vi.fn().mockReturnValue('loader-id'),
+      hide: vi.fn()
+    };
+
+    TestBed.configureTestingModule({
+      providers: [
+        LibraryShelfMenuService,
+        {provide: ConfirmationService, useValue: confirmationService},
+        {provide: MessageService, useValue: messageService},
+        {provide: LibraryService, useValue: libraryService},
+        {provide: ShelfService, useValue: shelfService},
+        {provide: TaskHelperService, useValue: taskHelperService},
+        {provide: Router, useValue: router},
+        {provide: DialogLauncherService, useValue: dialogLauncherService},
+        {provide: MagicShelfService, useValue: magicShelfService},
+        {provide: UserService, useValue: userService},
+        {provide: LoadingService, useValue: loadingService}
+      ]
+    });
+
+    const injector = TestBed.inject(EnvironmentInjector);
+    service = runInInjectionContext(injector, () => TestBed.inject(LibraryShelfMenuService));
+  });
+
+  describe('initializeLibraryMenuItems', () => {
+    it('should provide all menu items for a library', () => {
+      const items = service.initializeLibraryMenuItems(mockLibrary);
+      expect(items.length).toBe(1);
+      const options = items[0].items!;
+      expect(options.some(i => i.label === 'Edit Library')).toBe(true);
+      expect(options.some(i => i.label === 'Re-scan Library')).toBe(true);
+      expect(options.some(i => i.label === 'Custom Fetch Metadata')).toBe(true);
+      expect(options.some(i => i.label === 'Auto Fetch Metadata')).toBe(true);
+      expect(options.some(i => i.label === 'Delete Library')).toBe(true);
+    });
+
+    it('should call openLibraryEditDialog when Edit Library is clicked', () => {
+      const items = service.initializeLibraryMenuItems(mockLibrary);
+      const edit = items[0].items!.find(i => i.label === 'Edit Library');
+      edit!.command!({});
+      expect(dialogLauncherService.openLibraryEditDialog).toHaveBeenCalledWith(mockLibrary.id);
+    });
+
+    it('should call openLibraryMetadataFetchDialog when Custom Fetch Metadata is clicked', () => {
+      const items = service.initializeLibraryMenuItems(mockLibrary);
+      const fetch = items[0].items!.find(i => i.label === 'Custom Fetch Metadata');
+      fetch!.command!({});
+      expect(dialogLauncherService.openLibraryMetadataFetchDialog).toHaveBeenCalledWith(mockLibrary.id);
+    });
+
+    it('should call refreshMetadataTask when Auto Fetch Metadata is clicked', () => {
+      taskHelperService.refreshMetadataTask.mockReturnValue(of({}));
+      const items = service.initializeLibraryMenuItems(mockLibrary);
+      const auto = items[0].items!.find(i => i.label === 'Auto Fetch Metadata');
+      auto!.command!({});
+      expect(taskHelperService.refreshMetadataTask).toHaveBeenCalledWith({
+        refreshType: MetadataRefreshType.LIBRARY,
+        libraryId: mockLibrary.id
+      });
+    });
+
+    it('should show confirmation dialog for Re-scan Library', () => {
+      libraryService.refreshLibrary.mockReturnValue(of({}));
+      const items = service.initializeLibraryMenuItems(mockLibrary);
+      const rescan = items[0].items!.find(i => i.label === 'Re-scan Library');
+      rescan!.command!({});
+      expect(confirmationService.confirm).toHaveBeenCalledTimes(1);
+      const confirmCall = confirmationService.confirm.mock.calls[0][0];
+      expect(confirmCall.message).toContain(mockLibrary.name);
+      expect(confirmCall.header).toBe('Confirmation');
+    });
+
+    it('should refresh library and show success message on accept', () => {
+      libraryService.refreshLibrary.mockReturnValue(of({}));
+      const items = service.initializeLibraryMenuItems(mockLibrary);
+      const rescan = items[0].items!.find(i => i.label === 'Re-scan Library');
+      rescan!.command!({});
+      const confirmCall = confirmationService.confirm.mock.calls[0][0];
+      confirmCall.accept();
+      expect(libraryService.refreshLibrary).toHaveBeenCalledWith(mockLibrary.id);
+      expect(messageService.add).toHaveBeenCalledWith({
+        severity: 'info',
+        summary: 'Success',
+        detail: 'Library refresh scheduled'
+      });
+    });
+
+    it('should show error message if refreshLibrary fails', () => {
+      libraryService.refreshLibrary.mockReturnValue(throwError(() => ({})));
+      const items = service.initializeLibraryMenuItems(mockLibrary);
+      const rescan = items[0].items!.find(i => i.label === 'Re-scan Library');
+      rescan!.command!({});
+      const confirmCall = confirmationService.confirm.mock.calls[0][0];
+      confirmCall.accept();
+      expect(messageService.add).toHaveBeenCalledWith({
+        severity: 'error',
+        summary: 'Failed',
+        detail: 'Failed to refresh library'
+      });
+    });
+
+    it('should show confirmation dialog for Delete Library', () => {
+      libraryService.deleteLibrary.mockReturnValue(of({}));
+      const items = service.initializeLibraryMenuItems(mockLibrary);
+      const del = items[0].items!.find(i => i.label === 'Delete Library');
+      del!.command!({});
+      expect(confirmationService.confirm).toHaveBeenCalledTimes(1);
+      const confirmCall = confirmationService.confirm.mock.calls[0][0];
+      expect(confirmCall.message).toContain(mockLibrary.name);
+      expect(confirmCall.header).toBe('Confirmation');
+    });
+
+    it('should delete library, navigate, and show success message on accept', () => {
+      libraryService.deleteLibrary.mockReturnValue(of({}));
+      const items = service.initializeLibraryMenuItems(mockLibrary);
+      const del = items[0].items!.find(i => i.label === 'Delete Library');
+      del!.command!({});
+      const confirmCall = confirmationService.confirm.mock.calls[0][0];
+      confirmCall.accept();
+      expect(loadingService.show).toHaveBeenCalledWith(expect.stringContaining(mockLibrary.name));
+      expect(libraryService.deleteLibrary).toHaveBeenCalledWith(mockLibrary.id);
+      expect(router.navigate).toHaveBeenCalledWith(['/']);
+      expect(messageService.add).toHaveBeenCalledWith({
+        severity: 'info',
+        summary: 'Success',
+        detail: 'Library was deleted'
+      });
+      expect(loadingService.hide).toHaveBeenCalledWith('loader-id');
+    });
+
+    it('should show error message if deleteLibrary fails', () => {
+      libraryService.deleteLibrary.mockReturnValue(throwError(() => ({})));
+      const items = service.initializeLibraryMenuItems(mockLibrary);
+      const del = items[0].items!.find(i => i.label === 'Delete Library');
+      del!.command!({});
+      const confirmCall = confirmationService.confirm.mock.calls[0][0];
+      confirmCall.accept();
+      expect(messageService.add).toHaveBeenCalledWith({
+        severity: 'error',
+        summary: 'Failed',
+        detail: 'Failed to delete library'
+      });
+      expect(loadingService.hide).toHaveBeenCalledWith('loader-id');
+    });
+  });
+
+  describe('initializeShelfMenuItems', () => {
+    it('should provide all menu items for a shelf', () => {
+      const items = service.initializeShelfMenuItems(mockShelf);
+      expect(items.length).toBe(1);
+      const options = items[0].items!;
+      expect(options.some(i => i.label === 'Edit Shelf')).toBe(true);
+      expect(options.some(i => i.label === 'Delete Shelf')).toBe(true);
+    });
+
+    it('should call openShelfEditDialog when Edit Shelf is clicked', () => {
+      const items = service.initializeShelfMenuItems(mockShelf);
+      const edit = items[0].items!.find(i => i.label === 'Edit Shelf');
+      edit!.command!({});
+      expect(dialogLauncherService.openShelfEditDialog).toHaveBeenCalledWith(mockShelf.id);
+    });
+
+    it('should show confirmation dialog for Delete Shelf', () => {
+      shelfService.deleteShelf.mockReturnValue(of({}));
+      const items = service.initializeShelfMenuItems(mockShelf);
+      const del = items[0].items!.find(i => i.label === 'Delete Shelf');
+      del!.command!({});
+      expect(confirmationService.confirm).toHaveBeenCalledTimes(1);
+      const confirmCall = confirmationService.confirm.mock.calls[0][0];
+      expect(confirmCall.message).toContain(mockShelf.name);
+      expect(confirmCall.header).toBe('Confirmation');
+    });
+
+    it('should delete shelf, navigate, and show success message on accept', () => {
+      shelfService.deleteShelf.mockReturnValue(of({}));
+      const items = service.initializeShelfMenuItems(mockShelf);
+      const del = items[0].items!.find(i => i.label === 'Delete Shelf');
+      del!.command!({});
+      const confirmCall = confirmationService.confirm.mock.calls[0][0];
+      confirmCall.accept();
+      expect(shelfService.deleteShelf).toHaveBeenCalledWith(mockShelf.id);
+      expect(router.navigate).toHaveBeenCalledWith(['/']);
+      expect(messageService.add).toHaveBeenCalledWith({
+        severity: 'info',
+        summary: 'Success',
+        detail: 'Shelf was deleted'
+      });
+    });
+
+    it('should show error message if deleteShelf fails', () => {
+      shelfService.deleteShelf.mockReturnValue(throwError(() => ({})));
+      const items = service.initializeShelfMenuItems(mockShelf);
+      const del = items[0].items!.find(i => i.label === 'Delete Shelf');
+      del!.command!({});
+      const confirmCall = confirmationService.confirm.mock.calls[0][0];
+      confirmCall.accept();
+      expect(messageService.add).toHaveBeenCalledWith({
+        severity: 'error',
+        summary: 'Failed',
+        detail: 'Failed to delete shelf'
+      });
+    });
+  });
+
+  describe('initializeMagicShelfMenuItems', () => {
+    it('should provide all menu items for a magic shelf', () => {
+      userService.getCurrentUser.mockReturnValue({permissions: {admin: true}});
+      const items = service.initializeMagicShelfMenuItems(mockMagicShelf);
+      expect(items.length).toBe(1);
+      const options = items[0].items!;
+      expect(options.some(i => i.label === 'Edit Magic Shelf')).toBe(true);
+      expect(options.some(i => i.label === 'Delete Magic Shelf')).toBe(true);
+    });
+
+    it('should call openMagicShelfEditDialog when Edit Magic Shelf is clicked', () => {
+      userService.getCurrentUser.mockReturnValue({permissions: {admin: true}});
+      const items = service.initializeMagicShelfMenuItems(mockMagicShelf);
+      const edit = items[0].items!.find(i => i.label === 'Edit Magic Shelf');
+      edit!.command!({});
+      expect(dialogLauncherService.openMagicShelfEditDialog).toHaveBeenCalledWith(mockMagicShelf.id);
+    });
+
+    it('should show confirmation dialog for Delete Magic Shelf', () => {
+      userService.getCurrentUser.mockReturnValue({permissions: {admin: true}});
+      magicShelfService.deleteShelf.mockReturnValue(of({}));
+      const items = service.initializeMagicShelfMenuItems(mockMagicShelf);
+      const del = items[0].items!.find(i => i.label === 'Delete Magic Shelf');
+      del!.command!({});
+      expect(confirmationService.confirm).toHaveBeenCalledTimes(1);
+      const confirmCall = confirmationService.confirm.mock.calls[0][0];
+      expect(confirmCall.message).toContain(mockMagicShelf.name);
+      expect(confirmCall.header).toBe('Confirmation');
+    });
+
+    it('should delete magic shelf, navigate, and show success message on accept', () => {
+      userService.getCurrentUser.mockReturnValue({permissions: {admin: true}});
+      magicShelfService.deleteShelf.mockReturnValue(of({}));
+      const items = service.initializeMagicShelfMenuItems(mockMagicShelf);
+      const del = items[0].items!.find(i => i.label === 'Delete Magic Shelf');
+      del!.command!({});
+      const confirmCall = confirmationService.confirm.mock.calls[0][0];
+      confirmCall.accept();
+      expect(magicShelfService.deleteShelf).toHaveBeenCalledWith(mockMagicShelf.id);
+      expect(router.navigate).toHaveBeenCalledWith(['/']);
+      expect(messageService.add).toHaveBeenCalledWith({
+        severity: 'info',
+        summary: 'Success',
+        detail: 'Magic shelf was deleted'
+      });
+    });
+
+    it('should show error message if deleteMagicShelf fails', () => {
+      userService.getCurrentUser.mockReturnValue({permissions: {admin: true}});
+      magicShelfService.deleteShelf.mockReturnValue(throwError(() => ({})));
+      const items = service.initializeMagicShelfMenuItems(mockMagicShelf);
+      const del = items[0].items!.find(i => i.label === 'Delete Magic Shelf');
+      del!.command!({});
+      const confirmCall = confirmationService.confirm.mock.calls[0][0];
+      confirmCall.accept();
+      expect(messageService.add).toHaveBeenCalledWith({
+        severity: 'error',
+        summary: 'Failed',
+        detail: 'Failed to delete shelf'
+      });
+    });
+
+    it('should disable options for public shelf if not admin', () => {
+      userService.getCurrentUser.mockReturnValue({permissions: {admin: false}});
+      const publicMagicShelf = {...mockMagicShelf, isPublic: true};
+      const items = service.initializeMagicShelfMenuItems(publicMagicShelf);
+      const edit = items[0].items!.find(i => i.label === 'Edit Magic Shelf');
+      const del = items[0].items!.find(i => i.label === 'Delete Magic Shelf');
+      expect(edit!.disabled).toBe(true);
+      expect(del!.disabled).toBe(true);
+    });
+
+    it('should not disable options for public shelf if admin', () => {
+      userService.getCurrentUser.mockReturnValue({permissions: {admin: true}});
+      const publicMagicShelf = {...mockMagicShelf, isPublic: true};
+      const items = service.initializeMagicShelfMenuItems(publicMagicShelf);
+      const edit = items[0].items!.find(i => i.label === 'Edit Magic Shelf');
+      const del = items[0].items!.find(i => i.label === 'Delete Magic Shelf');
+      expect(edit!.disabled).toBe(false);
+      expect(del!.disabled).toBe(false);
+    });
+  });
+});
+
diff --git a/booklore-ui/src/app/features/book/service/library.service.spec.ts b/booklore-ui/src/app/features/book/service/library.service.spec.ts
new file mode 100644
index 000000000..e06c30c05
--- /dev/null
+++ b/booklore-ui/src/app/features/book/service/library.service.spec.ts
@@ -0,0 +1,167 @@
+import {beforeEach, describe, expect, it, vi} from 'vitest';
+import {TestBed} from '@angular/core/testing';
+import {EnvironmentInjector, runInInjectionContext} from '@angular/core';
+import {HttpClient} from '@angular/common/http';
+import {firstValueFrom, of, throwError} from 'rxjs';
+
+import {LibraryService} from './library.service';
+import {BookService} from './book.service';
+import {AuthService} from '../../../shared/service/auth.service';
+import {Library} from '../model/library.model';
+
+describe('LibraryService', () => {
+  let service: LibraryService;
+  let httpClientMock: any;
+  let bookServiceMock: any;
+  let authServiceMock: any;
+
+  beforeEach(() => {
+    httpClientMock = {
+      get: vi.fn(),
+      post: vi.fn(),
+      put: vi.fn(),
+      patch: vi.fn(),
+      delete: vi.fn()
+    };
+
+    bookServiceMock = {
+      removeBooksByLibraryId: vi.fn(),
+      bookState$: of({
+        books: [
+          {id: 1, libraryId: 10},
+          {id: 2, libraryId: 20},
+          {id: 3, libraryId: 10},
+          {id: 4}
+        ]
+      })
+    };
+
+    authServiceMock = {
+      token$: of('token')
+    };
+
+    TestBed.configureTestingModule({
+      providers: [
+        LibraryService,
+        {provide: HttpClient, useValue: httpClientMock},
+        {provide: BookService, useValue: bookServiceMock},
+        {provide: AuthService, useValue: authServiceMock}
+      ]
+    });
+
+    const injector = TestBed.inject(EnvironmentInjector);
+
+    service = runInInjectionContext(
+      injector,
+      () => TestBed.inject(LibraryService)
+    );
+  });
+
+  it('should fetch libraries and update state', () => {
+    const libraries: Library[] = [{id: 1, name: 'LibA', icon: 'icon', watch: true, paths: []}];
+    httpClientMock.get.mockReturnValue(of(libraries));
+    service['fetchLibraries']().subscribe(result => {
+      expect(result).toEqual(libraries);
+      expect(service['libraryStateSubject'].value.libraries).toEqual(libraries);
+      expect(service['libraryStateSubject'].value.loaded).toBe(true);
+    });
+  });
+
+  it('should handle fetch libraries error', () => {
+    httpClientMock.get.mockReturnValue(throwError(() => new Error('fail')));
+    service['libraryStateSubject'].next({libraries: null, loaded: false, error: null});
+    service['fetchLibraries']().subscribe({
+      error: (err: any) => {
+        expect(service['libraryStateSubject'].value.error).toBe('fail');
+      }
+    });
+  });
+
+  it('should create a library and update state', () => {
+    const library: Library = {id: 2, name: 'LibB', icon: 'icon', watch: true, paths: []};
+    httpClientMock.post.mockReturnValue(of(library));
+    service['libraryStateSubject'].next({libraries: [], loaded: true, error: null});
+    service.createLibrary(library).subscribe(result => {
+      expect(result).toEqual(library);
+      expect(service['libraryStateSubject'].value.libraries).toContain(library);
+    });
+  });
+
+  it('should update a library and update state', () => {
+    const library: Library = {id: 3, name: 'LibC', icon: 'icon', watch: true, paths: []};
+    httpClientMock.put.mockReturnValue(of({...library, name: 'LibC2'}));
+    service['libraryStateSubject'].next({libraries: [library], loaded: true, error: null});
+    service.updateLibrary({...library, name: 'LibC2'}, 3).subscribe(result => {
+      expect(result.name).toBe('LibC2');
+      expect(service['libraryStateSubject'].value.libraries?.find(l => l.id === 3)?.name).toBe('LibC2');
+    });
+  });
+
+  it('should delete a library and update state', () => {
+    httpClientMock.delete.mockReturnValue(of(void 0));
+    const library: Library = {id: 4, name: 'LibD', icon: 'icon', watch: true, paths: []};
+    service['libraryStateSubject'].next({libraries: [library], loaded: true, error: null});
+    service.deleteLibrary(4).subscribe(() => {
+      expect(service['libraryStateSubject'].value.libraries).toEqual([]);
+      expect(bookServiceMock.removeBooksByLibraryId).toHaveBeenCalledWith(4);
+    });
+  });
+
+  it('should handle delete library error', () => {
+    httpClientMock.delete.mockReturnValue(throwError(() => new Error('delete error')));
+    service['libraryStateSubject'].next({libraries: [{id: 5, name: 'LibE', icon: 'icon', watch: true, paths: []}], loaded: true, error: null});
+    service.deleteLibrary(5).subscribe({
+      error: () => {
+        expect(service['libraryStateSubject'].value.error).toBe('delete error');
+      }
+    });
+  });
+
+  it('should refresh a library and handle error', () => {
+    httpClientMock.put.mockReturnValue(throwError(() => new Error('refresh error')));
+    service['libraryStateSubject'].next({libraries: [{id: 6, name: 'LibF', icon: 'icon', watch: true, paths: []}], loaded: true, error: null});
+    service.refreshLibrary(6).subscribe({
+      error: () => {
+        expect(service['libraryStateSubject'].value.error).toBe('refresh error');
+      }
+    });
+  });
+
+  it('should update library file naming pattern', () => {
+    const library: Library = {id: 7, name: 'LibG', icon: 'icon', watch: true, paths: [], fileNamingPattern: 'old'};
+    const updatedLibrary = {...library, fileNamingPattern: 'new'};
+    httpClientMock.patch.mockReturnValue(of(updatedLibrary));
+    service['libraryStateSubject'].next({libraries: [library], loaded: true, error: null});
+    service.updateLibraryFileNamingPattern(7, 'new').subscribe(result => {
+      expect(result.fileNamingPattern).toBe('new');
+      expect(service['libraryStateSubject'].value.libraries?.find(l => l.id === 7)?.fileNamingPattern).toBe('new');
+    });
+  });
+
+  it('should check if library exists by name', () => {
+    const library: Library = {id: 8, name: 'LibH', icon: 'icon', watch: true, paths: []};
+    service['libraryStateSubject'].next({libraries: [library], loaded: true, error: null});
+    expect(service.doesLibraryExistByName('LibH')).toBe(true);
+    expect(service.doesLibraryExistByName('NonExistent')).toBe(false);
+  });
+
+  it('should find library by id', () => {
+    const library: Library = {id: 9, name: 'LibI', icon: 'icon', watch: true, paths: []};
+    service['libraryStateSubject'].next({libraries: [library], loaded: true, error: null});
+    expect(service.findLibraryById(9)).toEqual(library);
+    expect(service.findLibraryById(999)).toBeUndefined();
+  });
+
+  it('should get libraries from state', () => {
+    const libraries: Library[] = [
+      {id: 10, name: 'LibJ', icon: 'icon', watch: true, paths: []}
+    ];
+    service['libraryStateSubject'].next({libraries, loaded: true, error: null});
+    expect(service.getLibrariesFromState()).toEqual(libraries);
+  });
+
+  it('should get book count for library', async () => {
+    const count = await firstValueFrom(service.getBookCount(10));
+    expect(count).toBe(2);
+  });
+});
diff --git a/booklore-ui/src/app/features/book/service/library.service.ts b/booklore-ui/src/app/features/book/service/library.service.ts
index f1711934c..55e03da89 100644
--- a/booklore-ui/src/app/features/book/service/library.service.ts
+++ b/booklore-ui/src/app/features/book/service/library.service.ts
@@ -133,7 +133,6 @@ export class LibraryService {
       );
   }
 
-
   doesLibraryExistByName(name: string): boolean {
     return (this.libraryStateSubject.value.libraries || []).some(l => l.name === name);
   }
@@ -146,12 +145,6 @@ export class LibraryService {
     return this.libraryStateSubject.value.libraries || [];
   }
 
-  getLibraryPathById(pathId: number): string | undefined {
-    return this.libraryStateSubject.value.libraries
-      ?.find(lib => lib.paths.some(p => p.id === pathId))
-      ?.paths.find(p => p.id === pathId)?.path;
-  }
-
   getBookCount(libraryId: number): Observable<number> {
     return this.bookService.bookState$.pipe(
       map(state => (state.books || []).filter(b => b.libraryId === libraryId).length)
diff --git a/booklore-ui/src/app/features/book/service/metadata-task.spec.ts b/booklore-ui/src/app/features/book/service/metadata-task.spec.ts
new file mode 100644
index 000000000..e167f6c04
--- /dev/null
+++ b/booklore-ui/src/app/features/book/service/metadata-task.spec.ts
@@ -0,0 +1,123 @@
+import {beforeEach, describe, expect, it, vi} from 'vitest';
+import {TestBed} from '@angular/core/testing';
+import {EnvironmentInjector, runInInjectionContext} from '@angular/core';
+import {HttpClient} from '@angular/common/http';
+import {firstValueFrom, of, throwError} from 'rxjs';
+
+import {MetadataFetchTask, MetadataTaskService} from './metadata-task';
+import {API_CONFIG} from '../../../core/config/api-config';
+import {MetadataBatchProgressNotification, MetadataBatchStatus} from '../../../shared/model/metadata-batch-progress.model';
+
+describe('MetadataTaskService', () => {
+  let service: MetadataTaskService;
+  let httpClientMock: any;
+
+  beforeEach(() => {
+    httpClientMock = {
+      get: vi.fn(),
+      delete: vi.fn(),
+      post: vi.fn()
+    };
+
+    TestBed.configureTestingModule({
+      providers: [
+        MetadataTaskService,
+        { provide: HttpClient, useValue: httpClientMock }
+      ]
+    });
+
+    const injector = TestBed.inject(EnvironmentInjector);
+
+    service = runInInjectionContext(
+      injector,
+      () => TestBed.inject(MetadataTaskService)
+    );
+  });
+
+  it('should get task with proposals', async () => {
+    const task: MetadataFetchTask = {
+      id: 'task1',
+      status: 'IN_PROGRESS',
+      completed: 1,
+      totalBooks: 2,
+      startedAt: '2024-01-01T00:00:00Z',
+      completedAt: null,
+      initiatedBy: 'user1',
+      errorMessage: null,
+      proposals: []
+    };
+    httpClientMock.get.mockReturnValue(of({ task }));
+    const result = await firstValueFrom(service.getTaskWithProposals('task1'));
+    expect(result).toEqual(task);
+    expect(httpClientMock.get).toHaveBeenCalledWith(`${API_CONFIG.BASE_URL}/api/metadata/tasks/task1`);
+  });
+
+  it('should handle error in getTaskWithProposals', async () => {
+    httpClientMock.get.mockReturnValue(throwError(() => new Error('fail')));
+    try {
+      await firstValueFrom(service.getTaskWithProposals('task2'));
+    } catch (e: any) {
+      expect(e.message).toBe('fail');
+    }
+  });
+
+  it('should delete a task', async () => {
+    httpClientMock.delete.mockReturnValue(of(void 0));
+    await firstValueFrom(service.deleteTask('task3'));
+    expect(httpClientMock.delete).toHaveBeenCalledWith(`${API_CONFIG.BASE_URL}/api/metadata/tasks/task3`);
+  });
+
+  it('should handle error in deleteTask', async () => {
+    httpClientMock.delete.mockReturnValue(throwError(() => new Error('delete error')));
+    try {
+      await firstValueFrom(service.deleteTask('task4'));
+    } catch (e: any) {
+      expect(e.message).toBe('delete error');
+    }
+  });
+
+  it('should update proposal status', async () => {
+    httpClientMock.post.mockReturnValue(of(void 0));
+    await firstValueFrom(service.updateProposalStatus('task5', 123, 'ACCEPTED'));
+    expect(httpClientMock.post).toHaveBeenCalledWith(
+      `${API_CONFIG.BASE_URL}/api/metadata/tasks/task5/proposals/123/status`,
+      null,
+      { params: { status: 'ACCEPTED' } }
+    );
+  });
+
+  it('should handle error in updateProposalStatus', async () => {
+    httpClientMock.post.mockReturnValue(throwError(() => new Error('status error')));
+    try {
+      await firstValueFrom(service.updateProposalStatus('task6', 456, 'REJECTED'));
+    } catch (e: any) {
+      expect(e.message).toBe('status error');
+    }
+  });
+
+  it('should get active tasks', async () => {
+    const notifications: MetadataBatchProgressNotification[] = [
+      {
+        taskId: 't1',
+        completed: 1,
+        total: 2,
+        message: 'Running',
+        status: MetadataBatchStatus.IN_PROGRESS,
+        review: false
+      }
+    ];
+    httpClientMock.get.mockReturnValue(of(notifications));
+    const result = await firstValueFrom(service.getActiveTasks());
+    expect(result).toEqual(notifications);
+    expect(httpClientMock.get).toHaveBeenCalledWith(`${API_CONFIG.BASE_URL}/api/metadata/tasks/active`);
+  });
+
+  it('should handle error in getActiveTasks', async () => {
+    httpClientMock.get.mockReturnValue(throwError(() => new Error('active error')));
+    try {
+      await firstValueFrom(service.getActiveTasks());
+    } catch (e: any) {
+      expect(e.message).toBe('active error');
+    }
+  });
+});
diff --git a/booklore-ui/src/app/features/book/service/new-pdf-reader.service.spec.ts b/booklore-ui/src/app/features/book/service/new-pdf-reader.service.spec.ts
new file mode 100644
index 000000000..e76f2a994
--- /dev/null
+++ b/booklore-ui/src/app/features/book/service/new-pdf-reader.service.spec.ts
@@ -0,0 +1,70 @@
+import {beforeEach, describe, expect, it, vi} from 'vitest';
+import {TestBed} from '@angular/core/testing';
+import {EnvironmentInjector, runInInjectionContext} from '@angular/core';
+import {HttpClient} from '@angular/common/http';
+
+import {NewPdfReaderService} from './new-pdf-reader.service';
+import {AuthService} from '../../../shared/service/auth.service';
+import {API_CONFIG} from '../../../core/config/api-config';
+
+describe('NewPdfReaderService', () => {
+  let service: NewPdfReaderService;
+  let authServiceMock: any;
+  let httpClientMock: any;
+
+  beforeEach(() => {
+    authServiceMock = {
+      getOidcAccessToken: vi.fn(),
+      getInternalAccessToken: vi.fn()
+    };
+
+    httpClientMock = {
+      get: vi.fn()
+    };
+
+    TestBed.configureTestingModule({
+      providers: [
+        NewPdfReaderService,
+        {provide: AuthService, useValue: authServiceMock},
+        {provide: HttpClient, useValue: httpClientMock}
+      ]
+    });
+
+    const injector = TestBed.inject(EnvironmentInjector);
+
+    service = runInInjectionContext(
+      injector,
+      () => TestBed.inject(NewPdfReaderService)
+    );
+  });
+
+  it('should append token from OIDC access token', () => {
+    authServiceMock.getOidcAccessToken.mockReturnValue('oidc-token');
+    authServiceMock.getInternalAccessToken.mockReturnValue(null);
+
+    const url = 'http://test.com/resource';
+    const result = (service as any).appendToken(url);
+
+    expect(result).toContain('token=oidc-token');
+  });
+
+  it('should not append token if both tokens are null', () => {
+    authServiceMock.getOidcAccessToken.mockReturnValue(null);
+    authServiceMock.getInternalAccessToken.mockReturnValue(null);
+
+    const url = 'http://test.com/resource';
+    const result = (service as any).appendToken(url);
+
+    expect(result).toBe(url);
+  });
+
+  it('should call http.get with correct URL', () => {
+    authServiceMock.getOidcAccessToken.mockReturnValue('token123');
+
+    service.getAvailablePages(42);
+
+    expect(httpClientMock.get).toHaveBeenCalledWith(
+      `${API_CONFIG.BASE_URL}/api/v1/pdf/42/pages?token=token123`
+    );
+  });
+});
diff --git a/booklore-ui/src/app/features/book/service/shelf.service.spec.ts b/booklore-ui/src/app/features/book/service/shelf.service.spec.ts
new file mode 100644
index 000000000..4295fa488
--- /dev/null
+++ b/booklore-ui/src/app/features/book/service/shelf.service.spec.ts
@@ -0,0 +1,129 @@
+import {beforeEach, describe, expect, it, vi} from 'vitest';
+import {TestBed} from '@angular/core/testing';
+import {EnvironmentInjector, runInInjectionContext} from '@angular/core';
+import {HttpClient} from '@angular/common/http';
+import {of, throwError, firstValueFrom} from 'rxjs';
+
+import {ShelfService} from './shelf.service';
+import {BookService} from './book.service';
+import {Shelf} from '../model/shelf.model';
+
+describe('ShelfService', () => {
+  let service: ShelfService;
+  let httpClientMock: any;
+  let bookServiceMock: any;
+
+  beforeEach(() => {
+    httpClientMock = {
+      get: vi.fn(),
+      post: vi.fn(),
+      put: vi.fn(),
+      delete: vi.fn()
+    };
+
+    bookServiceMock = {
+      removeBooksFromShelf: vi.fn(),
+      bookState$: of({
+        books: [
+          {id: 1, shelves: [{id: 10}]},
+          {id: 2, shelves: [{id: 20}]},
+          {id: 3, shelves: []},
+          {id: 4}
+        ]
+      })
+    };
+
+    TestBed.configureTestingModule({
+      providers: [
+        ShelfService,
+        {provide: HttpClient, useValue: httpClientMock},
+        {provide: BookService, useValue: bookServiceMock}
+      ]
+    });
+
+    const injector = TestBed.inject(EnvironmentInjector);
+
+    service = runInInjectionContext(
+      injector,
+      () => TestBed.inject(ShelfService)
+    );
+  });
+
+  it('should fetch shelves and update state', () => {
+    const shelves: Shelf[] = [{id: 1, name: 'A', icon: 'icon'}];
+    httpClientMock.get.mockReturnValue(of(shelves));
+    service['fetchShelves']().subscribe(result => {
+      expect(result).toEqual(shelves);
+      expect(service['shelfStateSubject'].value.shelves).toEqual(shelves);
+      expect(service['shelfStateSubject'].value.loaded).toBe(true);
+    });
+  });
+
+  it('should handle fetch shelves error', () => {
+    httpClientMock.get.mockReturnValue(throwError(() => new Error('fail')));
+    service['shelfStateSubject'].next({shelves: null, loaded: false, error: null});
+    service['fetchShelves']().subscribe({
+      error: (err: any) => {
+        expect(service['shelfStateSubject'].value.error).toBe('fail');
+      }
+    });
+  });
+
+  it('should create a shelf and update state', () => {
+    const shelf: Shelf = {id: 2, name: 'B', icon: 'icon'};
+    httpClientMock.post.mockReturnValue(of(shelf));
+    service['shelfStateSubject'].next({shelves: [], loaded: true, error: null});
+    service.createShelf(shelf).subscribe(result => {
+      expect(result).toEqual(shelf);
+      expect(service['shelfStateSubject'].value.shelves).toContain(shelf);
+    });
+  });
+
+  it('should update a shelf and update state', () => {
+    const shelf: Shelf = {id: 3, name: 'C', icon: 'icon'};
+    httpClientMock.put.mockReturnValue(of({...shelf, name: 'C2'}));
+    service['shelfStateSubject'].next({shelves: [shelf], loaded: true, error: null});
+    service.updateShelf({...shelf, name: 'C2'}, 3).subscribe(result => {
+      expect(result.name).toBe('C2');
+      expect(service['shelfStateSubject'].value.shelves?.find(s => s.id === 3)?.name).toBe('C2');
+    });
+  });
+
+  it('should delete a shelf and update state', () => {
+    httpClientMock.delete.mockReturnValue(of(void 0));
+    const shelf: Shelf = {id: 4, name: 'D', icon: 'icon'};
+    service['shelfStateSubject'].next({shelves: [shelf], loaded: true, error: null});
+    service.deleteShelf(4).subscribe(() => {
+      expect(service['shelfStateSubject'].value.shelves).toEqual([]);
+      expect(bookServiceMock.removeBooksFromShelf).toHaveBeenCalledWith(4);
+    });
+  });
+
+  it('should handle delete shelf error', () => {
+    httpClientMock.delete.mockReturnValue(throwError(() => new Error('delete error')));
+    service['shelfStateSubject'].next({shelves: [{id: 5, name: 'E', icon: 'icon'}], loaded: true, error: null});
+    service.deleteShelf(5).subscribe({
+      error: () => {
+        expect(service['shelfStateSubject'].value.error).toBe('delete error');
+      }
+    });
+  });
+
+  it('should get shelf by id', () => {
+    const shelf: Shelf = {id: 6, name: 'F', icon: 'icon'};
+    service['shelfStateSubject'].next({shelves: [shelf], loaded: true, error: null});
+    expect(service.getShelfById(6)).toEqual(shelf);
+    expect(service.getShelfById(999)).toBeUndefined();
+  });
+
+  it('should get book count for shelf', async () => {
+    const count = await firstValueFrom(service.getBookCount(10));
+    expect(count).toBe(1);
+  });
+
+  it('should get unshelved book count', async () => {
+    const count = await firstValueFrom(service.getUnshelvedBookCount());
+    expect(count).toBe(2);
+  });
+});
+
diff --git a/booklore-ui/src/app/features/book/service/sort.service.spec.ts b/booklore-ui/src/app/features/book/service/sort.service.spec.ts
new file mode 100644
index 000000000..7c1d15e91
--- /dev/null
+++ b/booklore-ui/src/app/features/book/service/sort.service.spec.ts
@@ -0,0 +1,142 @@
+import {beforeEach, describe, expect, it, vi} from 'vitest';
+import {SortService} from './sort.service';
+import {Book} from '../model/book.model';
+import {SortDirection} from '../model/sort.model';
+
+function makeBook(partial: Partial<Book>): Book {
+  return {
+    id: 1,
+    bookType: "PDF",
+    libraryId: 1,
+    libraryName: "Lib",
+    ...partial,
+  } as Book;
+}
+
+describe('SortService', () => {
+  let service: SortService;
+  let books: Book[];
+
+  beforeEach(() => {
+    service = new SortService();
+    books = [
+      makeBook({
+        id: 1,
+        fileName: 'Book10.pdf',
+        metadata: {
+          bookId: 1,
+          title: 'Book 10',
+          authors: ['Alice'],
+          publishedDate: '2020-01-01',
+          seriesName: 'Series A',
+          seriesNumber: 2,
+          rating: 4.5,
+          reviewCount: 10,
+        },
+        personalRating: 3,
+        addedOn: '2021-01-01T00:00:00Z',
+        lastReadTime: '2022-01-01T00:00:00Z',
+        fileSizeKb: 1000,
+      }),
+      makeBook({
+        id: 2,
+        fileName: 'Book2.pdf',
+        metadata: {
+          bookId: 2,
+          title: 'Book 2',
+          authors: ['Bob'],
+          publishedDate: '2019-01-01',
+          seriesName: 'Series A',
+          seriesNumber: 1,
+          rating: 4.8,
+          reviewCount: 20,
+        },
+        personalRating: 5,
+        addedOn: '2020-01-01T00:00:00Z',
+        lastReadTime: '2023-01-01T00:00:00Z',
+        fileSizeKb: 2000,
+      }),
+      makeBook({
+        id: 3,
+        fileName: 'Book1.pdf',
+        metadata: {
+          bookId: 3,
+          title: 'Book 1',
+          authors: ['Alice'],
+          publishedDate: '2021-01-01',
+          rating: 4.0,
+          reviewCount: 5,
+        },
+        personalRating: 4,
+        addedOn: '2022-01-01T00:00:00Z',
+        lastReadTime: '2021-01-01T00:00:00Z',
+        fileSizeKb: 500,
+      }),
+    ];
+  });
+
+  it('should sort by title (natural order)', () => {
+    const sorted = service.applySort(books, {field: 'title', direction: SortDirection.ASCENDING, label: 'Title'});
+    expect(sorted.map(b => b.metadata?.title)).toEqual(['Book 1', 'Book 2', 'Book 10']);
+  });
+
+  it('should sort by author', () => {
+    const sorted = service.applySort(books, {field: 'author', direction: SortDirection.ASCENDING, label: 'Author'});
+    expect(sorted.map(b => b.metadata?.authors?.[0])).toEqual(['Alice', 'Alice', 'Bob']);
+  });
+
+  it('should sort by publishedDate descending', () => {
+    const sorted = service.applySort(books, {field: 'publishedDate', direction: SortDirection.DESCENDING, label: 'Published Date'});
+    expect(sorted.map(b => b.metadata?.title)).toEqual(['Book 1', 'Book 10', 'Book 2']);
+  });
+
+  it('should sort by series (titleSeries)', () => {
+    const sorted = service.applySort(books, {field: 'titleSeries', direction: SortDirection.ASCENDING, label: 'Series'});
+    expect(sorted.map(b => b.metadata?.title)).toEqual(['Book 1', 'Book 2', 'Book 10']);
+  });
+
+  it('should sort by personalRating descending', () => {
+    const sorted = service.applySort(books, {field: 'personalRating', direction: SortDirection.DESCENDING, label: 'Personal Rating'});
+    expect(sorted.map(b => b.personalRating)).toEqual([5, 4, 3]);
+  });
+
+  it('should sort by fileName (natural order)', () => {
+    const sorted = service.applySort(books, {field: 'fileName', direction: SortDirection.ASCENDING, label: 'File Name'});
+    expect(sorted.map(b => b.fileName)).toEqual(['Book1.pdf', 'Book2.pdf', 'Book10.pdf']);
+  });
+
+  it('should sort by fileSizeKb ascending', () => {
+    const sorted = service.applySort(books, {field: 'fileSizeKb', direction: SortDirection.ASCENDING, label: 'File Size'});
+    expect(sorted.map(b => b.fileSizeKb)).toEqual([500, 1000, 2000]);
+  });
+
+  it('should sort by addedOn descending', () => {
+    const sorted = service.applySort(books, {field: 'addedOn', direction: SortDirection.DESCENDING, label: 'Added On'});
+    expect(sorted.map(b => b.addedOn)).toEqual([
+      '2022-01-01T00:00:00Z',
+      '2021-01-01T00:00:00Z',
+      '2020-01-01T00:00:00Z',
+    ]);
+  });
+
+  it('should handle missing extractor gracefully', () => {
+    const spy = vi.spyOn(console, 'warn').mockImplementation(() => {
+    });
+    const sorted = service.applySort(books, {field: 'nonexistent', direction: SortDirection.ASCENDING, label: 'Nonexistent'} as any);
+    expect(sorted).toBe(books);
+    expect(spy).toHaveBeenCalled();
+    spy.mockRestore();
+  });
+
+  it('should return original array if no sort option', () => {
+    const sorted = service.applySort(books, null);
+    expect(sorted).toBe(books);
+  });
+
+  it('should sort by random (order is not predictable)', () => {
+    const sorted = service.applySort(books, {field: 'random', direction: SortDirection.ASCENDING, label: 'Random'});
+    expect(sorted.length).toBe(3);
+    // Can't assert order, but should be a permutation of the input
+    expect(sorted.map(b => b.id).sort()).toEqual([1, 2, 3]);
+  });
+});
diff --git a/booklore-ui/tsconfig.spec.json b/booklore-ui/tsconfig.spec.json
index 5fb748d92..64e3a73bc 100644
--- a/booklore-ui/tsconfig.spec.json
+++ b/booklore-ui/tsconfig.spec.json
@@ -1,10 +1,9 @@
-/* To learn more about Typescript configuration file: https://www.typescriptlang.org/docs/handbook/tsconfig-json.html. */
-/* To learn more about Angular compiler options: https://angular.dev/reference/configs/angular-compiler-options. */
 {
   "extends": "./tsconfig.json",
   "compilerOptions": {
     "outDir": "./out-tsc/spec",
     "types": [
+      "node",
       "jasmine"
     ]
   },