Python versions can be installed and managed by a tool called “pyenv” if you want to go further down that road.
Calibre also often needs specific plugins for different kinds of DRM. May be worth a search based on the eBook origin, in case you’re missing a simple extension that could solve it.
I also find that searching the web for “book title DRM free” usually results in a link to download a free DRM-free copy of the file.
It’s almost as if the DRM was a complete waste of everyone’s time and resources.












Pidgeon shit seems to be fair game for the FDA. I always assume some pidgeon shit, when consuming something in the USA.
My shower thought: I either have several food allergies, or one pidgeon shit allergy.