"Fandom" doesn't even begin to describe the affection and obsession that the Harry Potter books have inspired since they came out. We've already described the favorite haunts, sites, and activities of the Potter faithful at length here…and we've got to add that the lovefest shows no signs of dying down.

That's probably why the franchise is still going strong even after the end of the Harry Potter series, with works such as Harry Potter and the Cursed Child and Fantastic Beasts and Where to Find Them. Not to be cynical, but how could they not cash in on a gigantic super-loyal fanbase like that?