Thanks for playing, and for the great feedback! I like those ideas, especially limiting how often/when you get to go to the library. Would want to think about how it fits in with a return policy (maybe the library is only open certain days for checking out), worth exploring for sure.
Was also thinking about increasing the amount of available focus as you level up, or introducing some kind of temporary bonus focus when you complete a book to further incentivize having lots of them at a time.
Thanks again :)