Calibre is a free and open source "one-stop" e-book solution, which can fully meet your e-book needs. Calibre is free, open source and has a cross-platform design. It is a complete electronic library, including book management, format conversion, news, converting materials into e-books, and the synchronization function of e-book readers and integration into e-book readers.

Software functions:

1, open source code, cross-platform design, can run on Linux, OS X and Windows operating systems.

2. Have a complete electronic library, including book management, format conversion, news materials into e-books.

3. The synchronization function of the e-book reader is integrated into the e-book reader.