Okay there's no need to ridicule someone else out for sharing (as was asked) a book that meant something to them, even if it's a religious text. Your response is just mean-spirited.
The former has stood multiple tests of time and is my number one as well.
Also, FWIW, while Harry Potter is complete fiction, the former is at least partly a history lesson as well.
That said, I enjoyed both and I think some concepts are easier to grasp in Harry Potter.