Abandoned. The Peabody Adventures, #6

The whole gang from Peabody: Scruggs, Penny, Annette, Jack, and Jean, board a flight for a vacation in New England with Aunt Betty and Uncle Bill. But they find themselves abandoned in a strange, seemingly endless forest in the mountains. With very little food and no gear, they must keep moving as they try to figure out who has left them here, who is following them, and what they want.