When Nat Carver and his Wolven pal Woody learn that their arch enemy is creating a bad werewolf pack, they know they must stop him.Though it doesn't help that Nat's having problems with his own shape-shifting ability.Digging deep into history, the boys have to solve clues and riddles to stop one of the worst monsters ever!Jam-packed with all the hairy fun and adventure that thrilled readers in the first two books – and a howl lot more!Third in bestselling series of fast-paced, funny and accessible stories about a boy and his shape-shifting dog.