Track the facts about warriors, weapons, and battles throughout history in this nonfiction companion to the #1 bestselling Magic Tree House series!When Jack and Annie came back from their adventure in Magic Tree House #31: Warriors in Winter, they had lots of questions. What kinds of weapons did the ancient Greeks use? How did Roman soldiers fight? Why did knights have tournaments? Who was famous for his war elephants? Find out the answers to these questions and more as Jack and Annie track the facts about ancient warriors.Filled with up-to-date information, photographs, illustrations, and fun tidbits from Jack and Annie, the Fact Trackers are the perfect way for kids to find out more about the topics they discover in their favorite Magic Tree House adventures.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 booksMerlin Missions: More challenging adventures for the experienced readerFact Trackers: Nonfiction companions to your favorite Magic Tree House adventures