The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system Getting the facts behind the fiction has never looked better. Track the facts with Jack and Annie When Jack and Annie got back from their adventure in Magic Tree House #2: The Knight at Dawn, they had lots of questions. How were castles built? What was it like to live inside a castle? How did boys train to become knights?...