Calibre 9.7 introduces full offline mode for HTTPS content server connections, improved annotations grouping, viewer zoom enhancements, and several bug fixes.

Release: 9.7 [10 Apr, 2026] New features

Annotations browser: Allow grouping results by any field
E-book viewer: Handle native pinch to zoom gesture on touchpads the same as the pinch to zoom on touchscreens. Default action is to change font size.
Content server: Implement full offline mode when using HTTPS connections to the content server

Bug fixes

E-book viewer: Fix a regression in the previous release that caused annotations/last read information to not be saved in e-book files

Closes tickets: 2146912
AI: Make the GitHub backend a bit more robust

Closes tickets: 2147495
AI: OpenRouter backend: Fix reasoning level "auto" disabling all reasoning

Closes tickets: 2147008
Content server: Read book: Fix regression causing error during searching

Closes tickets: 2147261
Content server: Fix opening results from full text search not working

Closes tickets: 2146829
Fix a couple of minor regress in the new Full text search view introduced in the previous release
MTP driver: Linux: Fix a rare crash when connecting devices with large collections
Fix cover not being set when adding files to existing book records with no cover

New news sources

Cenital by Rodrigo Pazos

Improved news sources

The Week
The Age
Financial Times
Mint