Calibre is a FREE & open-source suite of e-book software for multiple platforms (Windows, Mac/macOS, Linux). Calibre supports organizing existing e-books into virtual libraries, displaying, editing, creating and conversion of e-books, as well as syncing e-books with a variety of e-readers. Editing books is supported for EPUB and AZW3 formats. Books in other formats like MOBI must first be converted to those formats, if they are to be edited.
Calibre is a vibrant open-source community with half a dozen developers and many, many testers and bug reporters. It is used in over 200 countries and has been translated into a dozen different languages by volunteers. Calibre has become a comprehensive tool for the management of digital texts...
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