The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Meet Jack and Annie! Jack and his younger sister, Annie, are just regular kids. But when they discover a tree house in the woods, something magical happens. Jack and Annie are whisked back in time to the Age of Dinosaurs, a medieval castle, ancient pyramids, and treasure-seeking pirates. Every visit to the magic tree house leads to adventure! Books in this set include: Dinosaurs Before Dark (#1), The Knight at Dawn (#2), Mummies in the Morning (#3), and Pirates Past Noon (#4). Did you know that there's a Magic Tree House book for every kid? Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter books Merlin Missions: More challenging adventures for the experienced reader Super Edition: A longer and more dangerous adventure Fact Trackers: Nonfiction companions to your favorite Magic Tree House adventures Have more fun with Jack and Annie at MagicTreeHouse.com!