diff --git a/apps/readest-app/src/app/library/components/Bookshelf.tsx b/apps/readest-app/src/app/library/components/Bookshelf.tsx
index b45f09c2..8522f434 100644
--- a/apps/readest-app/src/app/library/components/Bookshelf.tsx
+++ b/apps/readest-app/src/app/library/components/Bookshelf.tsx
@@ -31,11 +31,12 @@ interface BookshelfProps {
   isSelectAll: boolean;
   isSelectNone: boolean;
   handleImportBooks: () => void;
-  handleBookUpload: (book: Book) => Promise<boolean>;
   handleBookDownload: (book: Book) => Promise<boolean>;
-  handleBookDelete: (book: Book) => Promise<boolean>;
+  handleBookUpload: (book: Book, syncBooks?: boolean) => Promise<boolean>;
+  handleBookDelete: (book: Book, syncBooks?: boolean) => Promise<boolean>;
   handleSetSelectMode: (selectMode: boolean) => void;
   handleShowDetailsBook: (book: Book) => void;
+  handlePushLibrary: () => Promise<void>;
   booksTransferProgress: { [key: string]: number | null };
 }
 
@@ -50,6 +51,7 @@ const Bookshelf: React.FC<BookshelfProps> = ({
   handleBookDelete,
   handleSetSelectMode,
   handleShowDetailsBook,
+  handlePushLibrary,
   booksTransferProgress,
 }) => {
   const _ = useTranslation();
@@ -217,9 +219,14 @@ const Bookshelf: React.FC<BookshelfProps> = ({
   };
 
   const confirmDelete = async () => {
-    for (const book of getBooksToDelete()) {
-      handleBookDelete(book);
+    const books = getBooksToDelete();
+    const concurrency = 4;
+
+    for (let i = 0; i < books.length; i += concurrency) {
+      const batch = books.slice(i, i + concurrency);
+      await Promise.all(batch.map((book) => handleBookDelete(book, false)));
     }
+    handlePushLibrary();
     setSelectedBooks([]);
     setShowDeleteAlert(false);
     setShowSelectModeActions(true);
diff --git a/apps/readest-app/src/app/library/components/BookshelfItem.tsx b/apps/readest-app/src/app/library/components/BookshelfItem.tsx
index 322ebd7a..8fc7b8d3 100644
--- a/apps/readest-app/src/app/library/components/BookshelfItem.tsx
+++ b/apps/readest-app/src/app/library/components/BookshelfItem.tsx
@@ -77,9 +77,9 @@ interface BookshelfItemProps {
   transferProgress: number | null;
   setLoading: React.Dispatch<React.SetStateAction<boolean>>;
   toggleSelection: (hash: string) => void;
-  handleBookUpload: (book: Book) => Promise<boolean>;
   handleBookDownload: (book: Book) => Promise<boolean>;
-  handleBookDelete: (book: Book) => Promise<boolean>;
+  handleBookUpload: (book: Book, syncBooks?: boolean) => Promise<boolean>;
+  handleBookDelete: (book: Book, syncBooks?: boolean) => Promise<boolean>;
   handleSetSelectMode: (selectMode: boolean) => void;
   handleShowDetailsBook: (book: Book) => void;
 }
diff --git a/apps/readest-app/src/app/library/page.tsx b/apps/readest-app/src/app/library/page.tsx
index 1f469ff7..171fa9b7 100644
--- a/apps/readest-app/src/app/library/page.tsx
+++ b/apps/readest-app/src/app/library/page.tsx
@@ -419,41 +419,56 @@ const LibraryPageContent = ({ searchParams }: { searchParams: ReadonlyURLSearchP
 
   const importBooks = async (files: SelectedFile[]) => {
     setLoading(true);
-    const failedFiles = [];
+    const { library } = useLibraryStore.getState();
+    const failedImports: Array<{ filename: string; errorMessage: string }> = [];
     const errorMap: [string, string][] = [
       ['No chapters detected.', _('No chapters detected.')],
       ['Failed to parse EPUB.', _('Failed to parse the EPUB file.')],
       ['Unsupported format.', _('This book format is not supported.')],
     ];
-    const { library } = useLibraryStore.getState();
-    for (const selectedFile of files) {
+
+    const processFile = async (selectedFile: SelectedFile) => {
       const file = selectedFile.file || selectedFile.path;
-      if (!file) continue;
+      if (!file) return;
       try {
         const book = await appService?.importBook(file, library);
-        setLibrary([...library]);
         if (user && book && !book.uploadedAt && settings.autoUpload) {
           console.log('Uploading book:', book.title);
-          handleBookUpload(book);
+          handleBookUpload(book, false);
         }
       } catch (error) {
         const filename = typeof file === 'string' ? file : file.name;
         const baseFilename = getFilename(filename);
-        failedFiles.push(baseFilename);
         const errorMessage =
           error instanceof Error
             ? errorMap.find(([substring]) => error.message.includes(substring))?.[1] || ''
             : '';
-        eventDispatcher.dispatch('toast', {
-          message:
-            _('Failed to import book(s): {{filenames}}', {
-              filenames: listFormater(false).format(failedFiles),
-            }) + (errorMessage ? `\n${errorMessage}` : ''),
-          type: 'error',
-        });
+        failedImports.push({ filename: baseFilename, errorMessage });
         console.error('Failed to import book:', filename, error);
       }
+    };
+
+    const concurrency = 4;
+    for (let i = 0; i < files.length; i += concurrency) {
+      const batch = files.slice(i, i + concurrency);
+      await Promise.all(batch.map(processFile));
     }
+    pushLibrary();
+
+    if (failedImports.length > 0) {
+      const filenames = failedImports.map((f) => f.filename);
+      const errorMessage = failedImports.find((f) => f.errorMessage)?.errorMessage || '';
+
+      eventDispatcher.dispatch('toast', {
+        message:
+          _('Failed to import book(s): {{filenames}}', {
+            filenames: listFormater(false).format(filenames),
+          }) + (errorMessage ? `\n${errorMessage}` : ''),
+        type: 'error',
+      });
+    }
+
+    setLibrary([...library]);
     appService?.saveLibraryBooks(library);
     setLoading(false);
   };
@@ -468,13 +483,18 @@ const LibraryPageContent = ({ searchParams }: { searchParams: ReadonlyURLSearchP
   }, 500);
 
   const handleBookUpload = useCallback(
-    async (book: Book) => {
+    async (book: Book, syncBooks = true) => {
       try {
         await appService?.uploadBook(book, (progress) => {
           updateBookTransferProgress(book.hash, progress);
         });
+        setBooksTransferProgress((prev) => {
+          const updated = { ...prev };
+          delete updated[book.hash];
+          return updated;
+        });
         await updateBook(envConfig, book);
-        pushLibrary();
+        if (syncBooks) pushLibrary();
         eventDispatcher.dispatch('toast', {
           type: 'info',
           timeout: 2000,
@@ -484,6 +504,11 @@ const LibraryPageContent = ({ searchParams }: { searchParams: ReadonlyURLSearchP
         });
         return true;
       } catch (err) {
+        setBooksTransferProgress((prev) => {
+          const updated = { ...prev };
+          delete updated[book.hash];
+          return updated;
+        });
         if (err instanceof Error) {
           if (err.message.includes('Not authenticated') && settings.keepLogin) {
             settings.keepLogin = false;
@@ -541,7 +566,7 @@ const LibraryPageContent = ({ searchParams }: { searchParams: ReadonlyURLSearchP
   );
 
   const handleBookDelete = (deleteAction: DeleteAction) => {
-    return async (book: Book) => {
+    return async (book: Book, syncBooks = true) => {
       const deletionMessages = {
         both: _('Book deleted: {{title}}', { title: book.title }),
         cloud: _('Deleted cloud backup of the book: {{title}}', { title: book.title }),
@@ -555,7 +580,7 @@ const LibraryPageContent = ({ searchParams }: { searchParams: ReadonlyURLSearchP
       try {
         await appService?.deleteBook(book, deleteAction);
         await updateBook(envConfig, book);
-        pushLibrary();
+        if (syncBooks) pushLibrary();
         eventDispatcher.dispatch('toast', {
           type: 'info',
           timeout: 2000,
@@ -709,6 +734,7 @@ const LibraryPageContent = ({ searchParams }: { searchParams: ReadonlyURLSearchP
                 handleSetSelectMode={handleSetSelectMode}
                 handleShowDetailsBook={handleShowDetailsBook}
                 booksTransferProgress={booksTransferProgress}
+                handlePushLibrary={pushLibrary}
               />
             </div>
           </OverlayScrollbarsComponent>
diff --git a/apps/readest-app/src/app/reader/components/FoliateViewer.tsx b/apps/readest-app/src/app/reader/components/FoliateViewer.tsx
index bc19a631..bb36854e 100644
--- a/apps/readest-app/src/app/reader/components/FoliateViewer.tsx
+++ b/apps/readest-app/src/app/reader/components/FoliateViewer.tsx
@@ -408,6 +408,7 @@ const FoliateViewer: React.FC<{
   useEffect(() => {
     if (!viewSettings) return;
     applyBackgroundTexture(envConfig, viewSettings);
+    // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [
     viewSettings?.backgroundTextureId,
     viewSettings?.backgroundOpacity,