Calibre Release 8.8 - 2025-08-08
Source: https://calibre-ebook.com/whats-new
## New features
- E-book viewer: Improve display of Lookup results from Google
- Kobo driver: Add support for latest Tolino firmware
- Conversion: Handle -epub-text-emphasis properties used in some Japanese language EPUB books
- Piper Neural text to speech engine: re-write the backend used to run the Piper speech models to no longer need an external binary for improved performance and robustness. Closes tickets: [2117433](https://bugs.launchpad.net/calibre/+bug/2117433)
## Bug fixes
- Edit book: Reports: Fix sorting by name of CSS rules
- Fix template based custom column of tags type not being treated as multi valued when using it for similarity searches. Closes tickets: [2118744](https://bugs.launchpad.net/calibre/+bug/2118744)
- When adding books recursively do not try to import folder whose names named with an ebook file extension. These are, for example, generated by Apple Books
- EPUB3 Output: Fix various issues with processing nav files when they contain more than just the Table of Contents and are not included in the spine. Closes tickets: [2117255](https://bugs.launchpad.net/calibre/+bug/2117255), [2117336](https://bugs.launchpad.net/calibre/+bug/2117336)
## Improved news sources
- Economist
- Press Information Bureau
- Indian Express
- Wall Street Journal
- De Tijd
- Washington Post
## New features
- E-book viewer: Improve display of Lookup results from Google
- Kobo driver: Add support for latest Tolino firmware
- Conversion: Handle -epub-text-emphasis properties used in some Japanese language EPUB books
- Piper Neural text to speech engine: re-write the backend used to run the Piper speech models to no longer need an external binary for improved performance and robustness. Closes tickets: [2117433](https://bugs.launchpad.net/calibre/+bug/2117433)
## Bug fixes
- Edit book: Reports: Fix sorting by name of CSS rules
- Fix template based custom column of tags type not being treated as multi valued when using it for similarity searches. Closes tickets: [2118744](https://bugs.launchpad.net/calibre/+bug/2118744)
- When adding books recursively do not try to import folder whose names named with an ebook file extension. These are, for example, generated by Apple Books
- EPUB3 Output: Fix various issues with processing nav files when they contain more than just the Table of Contents and are not included in the spine. Closes tickets: [2117255](https://bugs.launchpad.net/calibre/+bug/2117255), [2117336](https://bugs.launchpad.net/calibre/+bug/2117336)
## Improved news sources
- Economist
- Press Information Bureau
- Indian Express
- Wall Street Journal
- De Tijd
- Washington Post