There’s Librera FD, on F-droid. It’s the open source version of Librera on the google play store. I believe it strips out the google api/cloud stuff, but its db /reading status/etc are all easily synced via Nextcloud (which is what I do). The only real negative I’ve found with it is that it’s search for text in books is slow compared to more popular reading apps like Moon+ Reader.

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Wait why the hell is lemmy.world federated with Meta anyways? That seems… stupid?

The discussion thread for Fedora specifically stated that the change was requested by Red Hat, as well.

Especially with Red Hat’s current shenanigans that just recently happened. I can’t see how anyone thought this was a good idea OR good timing for it.