Gods Child.
Harry Potter is not a childs occult primer.
Nor is it demonic. Its a book.
I have waded my way through all the books released so far and have not seen any real magick; fantasy yes real magick no.
However if you want to see a book that clearly broke the bounderies that christians happily give to their kiddies to read do look at Shadowmancer (review by Marcia of CANA here http://cana.userworld.com/cana_Shadowmancer1.html) or the even darker and real occult referances of Wormwood.