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!! \n\nWhen Jack and Annie got back from their adventure in Magic Tree House Merlin Mission #18: Dogs in the Dead of Night, they had lots of questions. How do St. Bernards help find avalanche survivors? Who are some of the most famous war dog heroes? What breeds make good service dogs? Find out the answers to these questions and more as Jack and Annie track the facts. \n\nFilled with up-to-date information, photos, illustrations, and fun tidbits from Jack and Annie, the Magic Tree House Fact Trackers are the perfect way for kids to find out more about the topics they discovered in their favorite Magic Tree House adventures.And teachers can use Fact Trackers alongside their Magic Tree House fiction companions to meet common core text pairing needs. \n\nDid you know that there’s a Magic Tree House book for every kid? \n\nMagic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter books \nMerlin Missions: More challenging adventures for the experienced reader \nSuper Edition: A longer and more dangerous adventure \nFact Trackers: Nonfiction companions to your favorite Magic Tree House adventures