[$] Catching up with calibre

Saying that calibre is
ebook-management software undersells the application by a fair
margin. Calibre is an open-source Swiss Army knife for ebooks that can
be used for everything from creating ebooks, converting ebooks from
obscure formats to modern formats like EPUB, to serving up an ebook
library over the web. The most recent major release, calibre 8.0,
brings a better text-to-speech engine, a tool for creating audio
overlays when authoring ebooks, support for profiles in the ebook
viewer, and more.