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 #5: Afternoon on the Amazon, they had lots of questions. How much rain falls in a rain forest? What is the world's heaviest insect? What the heck is a sausage tree? Why is it important to preserve the world's rain forests? 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.