Book: the entire series Greyback's name doesn't pop up in all of the books but you know that he's still out there, attacking children and feasting on them. It's such a shame that Greyback didn't get the film time that he deserves because as far as scary villains go, he's a close runner up to Voldemort in the books. He is relentless and preys on those who are most vulnerable and you know, he eats them... It doesn't help that there isn't any cure so if you get bitten but manage to survive, you have to live the rest of your life transforming into a werewolf at the turn of every full moon.