After putting some blocks in a storage book, I wanted to get them out again.
From what I understand, the only efficient way to do this is via the library block and a hopper, but the hopper doesn't seem to pull from the library block at all

Actually nevermind on this. Seems to work fine on a clean fabric install. Guess it's just got lots of wonky behavior with the forge-fabric connector api for some reason.

I have been meaning to test out that connector. I am using the fabric transfer api for moving items off of a book with a hopper so I imagine its still not supported.

After putting some blocks in a storage book, I wanted to get them out again. From what I understand, the only efficient way to do this is via the library block and a hopper, but the hopper doesn't seem to pull from the library block at all

On another note, I am going to redesign this mod from the ground up. I have a few fundamental problems I want to address. Needing a block to get items out of a book is not intuitive. Book crafting is very basic and I constrained myself to "vanilla" early on and I do not need to anymore. I have a lot of "neat" mechanics here that I think with a redesign and a more thought out approach could really help the mod have more of an identity. Any suggestions would be appreciated :)

Sounds like a great plan! So far with the connector api, the only thing working correctly is the villager book. The husbandry, etc ones have broken timers.

Suggestions wise, I think interacting with the library to open a chest like inventory with the contents of all books in the library would be cool. Could also do a similar idea with the Lectern, and/or let the Lectern act as a central point for nearby libraries.