It’s unfortunately a fairly sparse space. With that said, I’m not sure how much automation benefits. Books take a very long time to read compared to watching a series/movie. It’s ok to spend that little extra time to search Anna’s Archive bc the time spent attaining the material vs consuming it will still be higher than just about anything else. Having scoured the space myself just recently, Anna’s Archive is really the best option, with myanonymouse as great backup. usenet is honestly garbage for ebooks and music.