While I love Harry Potter, I find that behavior odd. I guess if there's some context like: I like supernatural and fantasy fiction. Give me options."
Harry Potter has to be on that list, probably at the top by any reasonable metric. But then maybe it has to be at the top of any book list given how impactful it's been. The LLMs are a bit of a black box to me. Sometimes I can rationalize, sometimes I can't.