A thoughtful look at the books, through the lens of spirituality. Okay, that sounds weird: they take the Harry Potter books and analyze with the same lens that you would the Bible, or any sacred text. Insightful and kind.
The Harry Potter series was a defining text for almost an entire generation, and so, it would make sense to look at them through a more... religious lens. And it makes sense, if a book series had such a profound effect, then study it appropriately.