1) Remove the ability to open book-details link windows using a query. It was never documented and ui.py didn't support it. 2) Simplify management of book details windows. There can now only be three windows, all non-modal on top of calibre, all with calibre as the parent. Each window has a "purpose". The first is the normal book details slave window, the second is a locked book details window, and the third is a book-details link window. 3) Add more menu actions to Show Book Details: open a locked window and close all book details windows. Use this menu where the menuless qaction was previously used.
calibre

calibre is an e-book manager. It can view, convert, edit and catalog e-books in all of the major e-book formats. It can also talk to e-book reader devices. It can go out to the internet and fetch metadata for your books. It can download newspapers and convert them into e-books for convenient reading. It is cross platform, running on Linux, Windows and macOS.
For more information, see the calibre About page.
Screenshots
Usage
See the User Manual.
Development
Setting up a development environment for calibre.
A tarball of the source code for the current calibre release.
Bugs
Bug reports and feature requests should be made in the calibre bug tracker at Launchpad. GitHub is only used for code hosting and pull requests.
Support calibre
calibre is a result of the efforts of many volunteers from all over the world. If you find it useful, please consider contributing to support its development. Donate to support calibre development.
Building calibre binaries
See Build instructions for instructions on how to build the calibre binaries and installers for all the platforms calibre supports.