I don’t think past liked books are nearly enough information to provide a good book for you today. You need a lot more information about the state of someone’s mind.
You're talking to a dude. (in my case.) I mentioned 8 books.
I won't tell you exactly what to do, but one way to do it is to measure your surprise with me choosing each of those 8 books when you provide a recommendation back to me of what I should read next. I think I get kind of that experience talking to someone about books.
Talking to someone about books gives you so much more information than a book list. Their expressions, their accent, their energy level, their clothes, and many other things help to provide supplemental information.
