The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Jack and Annie must find the four things that will free an enchanted dog named Teddy from a spell. Their quest leads them to a ship lost at sea, the Great Plains, the forests of India, and the Australian Outback. It???s a difficult and dangerous mission, but Jack and Annie will do anything to help their new friend, Teddy! Books in this set include: Tonight on the Titanic (#17), Buffalo Before Breakfast (#18), Tigers at Twilight (#19), and Dingoes at Dinnertime (#20).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