The Harry Potter series is going to go down in history as one of greatest stories for children of all time. Yes, we said "stories for children" even though there are adults out there who have read through the collection three or four times by now.
But, at the end of the day, the books weren't written for them. Which makes all of the following frightening elements even more unnerving.
(As always, thanks to AuntieMeme for the magic she works putting these together.)