When Jack and Annie return from their adventure in Stallion at Starlight, they have lots of questions. Why did people tame horses? What jobs do horses have today? Why was Alexander the Great's horse so famous? This nonfiction companion book answers those questions and more. Illustrations. Filled 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.