diff --git a/apps/readest-app/src/app/library/hooks/useBooksSync.ts b/apps/readest-app/src/app/library/hooks/useBooksSync.ts
index 47318f4b..223b7dca 100644
--- a/apps/readest-app/src/app/library/hooks/useBooksSync.ts
+++ b/apps/readest-app/src/app/library/hooks/useBooksSync.ts
@@ -50,7 +50,7 @@ export const useBooksSync = () => {
         }
       },
       SYNC_BOOKS_INTERVAL_SEC * 1000,
-      { emitLast: false },
+      { emitLast: true },
     ),
     [syncBooks],
   );
diff --git a/apps/readest-app/src/app/library/utils/libraryUtils.ts b/apps/readest-app/src/app/library/utils/libraryUtils.ts
index 965e1390..107f72a7 100644
--- a/apps/readest-app/src/app/library/utils/libraryUtils.ts
+++ b/apps/readest-app/src/app/library/utils/libraryUtils.ts
@@ -4,7 +4,22 @@ import { formatAuthors, formatTitle } from '@/utils/book';
 export const createBookFilter = (queryTerm: string | null) => (item: Book) => {
   if (!queryTerm) return true;
   if (item.deletedAt) return false;
-  const searchTerm = new RegExp(queryTerm, 'i');
+  let searchTerm: RegExp;
+  try {
+    searchTerm = new RegExp(queryTerm, 'i');
+  } catch {
+    const lowerQuery = queryTerm.toLowerCase();
+    const title = formatTitle(item.title).toLowerCase();
+    const authors = formatAuthors(item.author).toLowerCase();
+
+    return (
+      title.includes(lowerQuery) ||
+      authors.includes(lowerQuery) ||
+      item.format.toLowerCase().includes(lowerQuery) ||
+      (item.groupName && item.groupName.toLowerCase().includes(lowerQuery)) ||
+      (item.metadata?.description && item.metadata.description.toLowerCase().includes(lowerQuery))
+    );
+  }
   const title = formatTitle(item.title);
   const authors = formatAuthors(item.author);
   return (