When Jack and Annie came back from their adventure in 'Shadow of the Shark', they had lots of questions. How many teeth do sharks have? What is their favourite food? What are some other top predators? Find out the answers to these questions and more as Jack and Annie track the facts about sharks and other predators. Filled with up-to-date information, photographs, 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 discover in their favourite Magic Tree House adventures.