Why are those mutually exclusive? The code is open source, and your added books are private. This is presumably a goodreads without the social aspect.

Then make an instance yourself, easy peasy

This is a great way to find servers, but I don’t see how i can use it to find specific communities. Let’s say I wanted to see if a community has been created that discusses the book series The Wheel of Time. Is there a good way to look for this, within all the servers?