It has a cornucopia of features divided into the following main categories:

  • Library Management
  • E-book conversion
  • Syncing to e-book reader devices
  • Downloading news from the web and converting it into e-book form
  • Comprehensive e-book viewer
  • Content server for online access to your book collection

What's New:

New features

  • Edit book: When right clicking on a class in a HTML file, add an option to rename the class throughout the book
  • Adding from ISBN: Add an option to check if there are existing books with the specified ISBNs already in the library
    • Closes tickets: 1919103
  • Template tester: Instead of next/last, the template tester now shows the template values for selected books
    • Closes tickets: 1920576
  • Content server: Allow swiping left and right to show next/previous book on the book details page
    • Closes tickets: 1918047
  • E-book viewer: Make the commonly used shift+arrow key shortcuts for modifying selections using the keyboard work. Also add shorcuts for selecting by character, line and paragraph.
    • Closes tickets: 1919072

Bug fixes

  • MOBI Output: Fix latest kindle firmware not displaying select publisher font option for calibre produced azw3 files
    • Closes tickets: 1920613
  • E-book viewer: Fix errors when viewing books with mathematics that are split over multiple internal files
    • Closes tickets: 1919033
  • Content server viewer: Fix highlights not sorted correctly in the highlights panel
    • Closes tickets: 1918436
  • Get books: Fix smashwords plugin not working because of website changes
    • Closes tickets: 1918737
  • Improve the performance of QuickView especially when using composite columns
    • Closes tickets: 1920733
  • Improve performance of the virtual_libraries() template function
    • Closes tickets: 1918428
  • Browser viewer: Fix Go to Location not working for positions
    • Closes tickets: 1920250
  • E-book viewer: Fix searching in the Table of Contents not working
    • Closes tickets: 1905257
  • E-book viewer: In paged mode, fix scrolling not working correctly when margins are set to zero
    • Closes tickets: 1918105
  • E-book viewer: Fix incorrect ToC navigation in books that link the entries to inline tags that wrap block tags that span multiple pages
    • Closes tickets: 1918437
  • Category editor: Searching in library shouldn't automatically opens Quickview
    • Closes tickets: 1920592
  • Conversion: Fix a hang caused by long sequences of non-word characters when heuristics are enabled, either explicitly or for some input formats such as TXT
    • Closes tickets: 1919260
  • Fix a regression in calibre 5 that broke --explode-book and --implode-book actions for calibre-debug.exe
  • Fix a regression in calibre 5 that broke setting metadata in RTF files

New news sources

  • ZackZack.at by Dirk Gomez