To do better I'd want to sort/filter at least semiautomatically by personal taste/judgement -- that could use a UI along the lines of the one I prototyped for a client for image search in the late 2000s, maybe mixed with ideas from Advogato. That's starting to sound like work, to make a new system and get it to be popular enough to accumulate enough data to work with. I wonder if there's an open-data form of something like this five-books site (not this one: https://fivebooks.com/Terms-of-Service/)