The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering systemA castle with a secret passageThats what Jack and Annie find when the Magic Tree House whisks them back to the Middle Ages for another wild adventure. In the Great Hall of the castle, a feast is under way. But Jack and Annie arent exactly welcome guestsDid you know that theres a Magic Tree House book for every kid? Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter booksMerlin Missions: More challenging adventures for the experienced readerSuper Edition: A longer and more dangerous adventureFact Trackers: Nonfiction companions to your favorite Magic Tree House adventures Have more fun with Jack and Annie at MagicTreeHouse.com