A few things - it checks the books it suggests actually exist is maybe the most important (I was really bummed to discover some Claude suggested for me did not). My main reason for building it was to hep me find stuff from the library, so there’s that as well. It also tries to do a little better than more of author X, by using the llm’s ‘understanding’ of the books and what actually mattered to you about them to build up a little profile of your taste and find maybe slightly unusual things that would work for you.
Oh, and it definitely does not pat itself on the back for suggesting books for you.
(You can see the profile it makes and correct it - it did a pretty good job on me)