Their magic tree house takes Jack and Annie back to retrieve a lost story in ancient Greece, where they witness the original Olympic games and are surprised to find what girls of the time were not allowed to do. The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! No girls allowed at the Olympic Games! That's the rule when the Magic Tree House whisks Jack and Annie back to ancient Greece. But when Annie tells jack to go to the games without her, he knows she's up to something. Will Annie find a way to see the games? Or will she get herself--and Jack--into Olympic-size trouble? Find out in Hour of the Olympics. 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