Release: 9.1 [31 Jan, 2026] :

New features

This is a pure bugfix release fixing various regressions in calibre 9.0

Bug fixes

macOS: Fix crash when pasting cover image
Closes tickets: 2139397

Fix restore database not working
Closes tickets: 2139455

Windows: Fix the Read Aloud feature in the E-book viewer not working when using the Piper engine
Closes tickets: 2139399

Fix using icon themes in "For dark and light" mode not working
Closes tickets: 2139454

Fix covers in the Cover grid slightly stretched on high DPI screens
Amazon metadata download: Fix publication date not being retrieved form amazon.co.jp
Closes tickets: 2139414

Improved news sources

Economist

Release: 9.0 [30 Jan, 2026] :

New features

A new Bookshelf view with your books arranged on shelves showing their spines
Click the Layout button in the bottom right corner of the calibre window to switch to Bookshelf view.

Viewer: Add an "Edit book" button to the viewer controls to edit the current book
The button is visible when the current book is in an editable format such as EPUB, AZW3 or KEPUB. It opens the editor at the approximate location that is currently being viewed.

Linux: Add momentum based scrolling for the book list when using high resolution scroll devices like touchpads
TXT Output: Add an option to replace images by their alt attribute text
Closes tickets: 2137504

EPUB: Support reading cover images from so called "Open Manga Format" non-conformant EPUB files produced by some Japanese publishers.
Add a tweak to change the font size of the AI chat widget
Closes tickets: 2138862

E-book viewer: Allow typing in a page number to go to instead of forcing the user to scroll through existing page numbers
Kobo driver: Support for updated firmware
A new tweak to hide all AI features from the user interface in Preferences->Tweaks

Bug fixes

KEPUB Output: Add some CSS to fix rendering of tate-chu-yoko text on Kobo devices
Only show the Sort button on the search bar if the Sort By action has not been added to the search bar by the user
Closes tickets: 2138770

EPUB3 metadata: Handle identifiers that use HTTP URLs without the url: prefix
Closes tickets: 2137122

Edit book: Check book: Fix spurious unreferenced warnings for SMIL media overlay audio files
Edit book: Reports: Have pressing enter do the same action as double clicking the current entry
Closes tickets: 2138179

E-book viewer: Improve export of SVG images
Disable GPU acceleration for Qt WebEngine by default to prevent crashes on some older systems. Can be re-enabled via Preferences->Tweaks
Speedup calibre shutdown time by a couple of seconds

Improved news sources

Times Literary Supplement
Private Eye
New Yorker