The thrilling conclusion to #1 bestselling Shiver trilogy from Maggie Stievater. then. When Sam met Grace, he was a wolf and she was a girl. Eventually he found a way to become a boy, and their love transformed from curious distance to the intense closeness of shared lives. now. That should have been the end of their story. But Grace was not meant to stay human. Now she is the wolf. And the wolves of Mercy Falls are about to be hunted in one final, spectacular kill. forever.