The Calibre open source project is an e-book management tool released by the official Calibre. It can view, convert, edit and classify e-books in all mainstream formats. Calibre is a cross-platform software that can run on Linux, Windows and macOS.
Calibre 7.15 has been officially released now, and the update contents are as follows:
New features
Bug fixes
Details can be viewed in the update note: click