I will read almost any novel with (A) a map, (B) a family tree, and/or (C) time travel. I also like reading about books and librarians. So if you hand me a book about a time-traveling librarian and there’s a family tree with the librarian’s ancestors and a map of the library, I will be all in.
By the way, I didn’t know this when I was a kid, and I wish I had: If you have a particular interest in books about, say, talking waffles who move to Hollywood and are only offered parts as breakfast foods but overcome the odds to win an Oscar as Joan of Arc, you can tell a bookseller or librarian and they can suggest titles for you. (I think you’re out of luck in the specific case above, but it never hurts to ask!)