Shiver by Maggie Stiefvater tells the story of a girl, Grace, who is attacked by a pack of wolves, but saved by one wolf among the pack. After the attack, Grace is infatuated with the wolves particularly the wolf who saved her, Sam. Maggie soon learns that Sam is a werewolf, and she and Sam spend the summer together, but Sam believes this is the last summer he will transform into a human. Now Sam and Maggie are doing everything they can to avoid Sam’s trasnformation back into a wolf.