Well theoretically you could use it already, there are just some convenience features that are missing, like buttons for skipping a few seconds back and forth. The audiobook libraries also work a bit differently than music libraries, so I’m not sure how easy it would be to natively support them.
For now you could create albums or playlists for your audio books, and it should play just fine, and also save the progress :)

Discord is just easiest for us to maintain. The project is on GitHub though, and any important discussions are available there as well!

<3

Awesome! F-Droid sadly doesn’t have proper support for beta versions. That’s also why it’s high time to release the new features onto stable. But I would like to avoid changing design too often, so I’m waiting until most things are ready.