Calibre is the prime open source e-book management program, but the Debian releases often lag behind the official releases. Furthermore, the Debian packages remove support for rar packed e-books, which means that several comic book formats cannot be handled.
Thus, I have published a local repository targeting Debian/sid of calibre with binaries for amd64 where rar is enabled and as far as possible the latest version is included.
deb http://www.preining.info/debian/ calibre main deb-src http://www.preining.info/debian/ calibre main
The releases are signed with my Debian key 0x6CACA448860CDC13