Jack and Annie love animals! And they love to learn more about the animals they encounter on their adventures in the magic tree house. Join them as they track the facts about dolphins, sharks, polar bears, penguins, pandas, and much more in these four great books. Filled with up-to-date information, photographs, illustrations, and fun tidbits from Jack and Annie, the Fact Trackers encourage kids to find out more about the topics they discover in their favorite Magic Tree House adventures. Recently rebranded, these four Fact Tracker paperbacks all in one box are the perfect gift for animal lovers, nonfiction readers, and fans of the Magic Tree House series.