When I write Magic Tree House^® adventures, I love including facts about the times and places Jack and Annie visit. But when readers finish these adventures, I want them to learn even more. So that’s why we write a series of nonfiction books that are companions to the fiction titles in the Magic Tree House^® series. We call these books Fact Trackers because we love to track the facts! Whether we’re researching dinosaurs, pyramids, Pilgrims, sea monsters, or cobras, we’re always amazed at how wondrous and surprising the real world is. We want you to experience the same wonder we do—so get out your pencils and notebooks and hit the trail with us. You can be a Magic Tree House^® Fact Tracker, too!