Hi John Unfortunately necessary python modules for Calibre in version 2 have been removed or are not available in Debian due to the ongoing Python 2 purge.
That means as long as upstream Calibre does not switch to Python 3 we cannot include it in Debian. See my blog post https://www.preining.info/blog/2019/10/rip-for-now-calibre-in-debian/ Best Norbert -- PREINING Norbert http://www.preining.info Accelia Inc. + JAIST + TeX Live + Debian Developer GPG: 0x860CDC13 fp: F7D8 A928 26E3 16A1 9FA0 ACF0 6CAC A448 860C DC13