This sequel to Shiver is a bridge book through and through, designed to push the story forward, presumably to the third and final installment of Stiefvater’s bestselling series about werewolves. But whereas Shiver was tight as a drum in its focus on the intense, star-crossed romance between werewolf Sam and Grace, the ordinary girl who loves him, this book meanders. Again Stiefvater switches points of view, but between four characters now: Sam and Grace, still in love and still facing threats to said love; Isabel, who recently lost a brother to the wolves; and Cole, newly a werewolf. Sometimes these switches occur multiple times within the same chapter, which can make for confusing reading with respect to who is doing or thinking what. Stiefvater expands the story to include complications with Grace’s health and her parents, Sam’s reluctance to care for new werewolves, and Isabel’s growing connection to Cole even as he desperately seeks escape from his old life. While this book does not stand on its own, it sets the stage for an explosive third installment. Ages 13–18. (July)