The Emerald Atlas

This promising first volume in debut author Stephens's Books of Beginning trilogy concerns siblings Kate, Michael, and Emma, who, when very young, were taken from their parents to protect them from unspecified forces of darkness. They have since spent 10 years in a series of unpleasant orphanages; the last of these—which, oddly enough, houses no children but themselves—is run by the eccentric Dr. Pym. While exploring their palatial yet decrepit new home tucked away in the Adirondacks, the children discover a magical green book, which transports them into the recent past. There they do battle with a beautiful witch who has terrorized and enslaved the local people in her unsuccessful search for the very book the children possess. Adventures follow, featuring murderous zombielike Screechers, time travel paradoxes, and multiple revelations about Dr. Pym. If Stephens's characterizations sometimes dip into cliché (grumpy, Scottish-ish dwarves; noble/heroic natives; an effete evil assistant), few will mind. This fast-paced, fully imagined fantasy is by turns frightening and funny, and the siblings are well-crafted and empathetic heroes. Highly enjoyable, it should find many readers. Ages 8–12. (Apr.)