Calibre 8.5 enhances Kobo support and introduces UI tweaks like better scrollbars and easier management of multiple book files.| Linuxiac
Calibre 8.4 adds improved KEPUB output for better text justification on Kobo, with new features in the e-book viewer and several key bug fixes.| Linuxiac
Calibre 8.6 open-source e-book manager now defaults to AZW3 for Kindle, retires MOBI, and boosts database restore speeds.| Linuxiac