Random House Children`s Books Magic Tree House Books 13-16: the Mystery of the Lost Libraries

Morgan, the magical librarian of Camelot, sends Jack and Annie to four ancient worlds in this boxed set of exciting Magic Tree House adventures: "#13: Vacation Under the Volcano, #14: Day of the Dragon King, #15: Viking Ships at Sunrise," and "#16: Hour of the Olympics." A bonus Magic Tree House poster is included.