If you are interested in setting up your own Mastodon ebooks bot, I published the source code powering @shel_ebooks, @gaypow_ebooks and @crom_ebooks on Github as well as a guide to getting the bot up and running on a free Heroku app.
Don't need to know how to code, but you do need to be comfortable with the command line. PRs welcome, I am not very good at this sort of thing.
uhhhh I just realized that as-is, this will only work on botsin.space, that shouldn't be too hard to fix though.
An online home for a rag-tag group of pals.