The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new‎,‎ easy‎-to‎-use numbering system‎!‎ Cannon fire‎!‎ That‎'‎s what Jack and Annie hear when the Magic Tree House whisks them back to the time of the American Civil War‎.‎ There they meet a famous nurse named Clara Barton and do their best to help wounded soldiers‎.‎ It is their hardest journey in time yet—and the one that will make the most difference to their own lives‎!‎ 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