Book Description: Magic Tree House Research Guides are now Magic Tree House Fact Trackers! Track the facts with Jack and Annie!When Jack and Annie got back from their adventure in Magic Tree House #2: The Knight at Dawn, they had lots of questions. How were castles built? What was it like to live inside a castle? How did boys train to become knights? Did horses really wear armor? Find out the answers to these questions and more as Jack and Annie track the facts. 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.