Read the adventure and track the facts—it's two great ebooks in one! Join Jack and Annie as they travel to the time of dinosaurs in Magic Tree House® #1: Dinosaurs Before Dark. Then uncover the facts behind the fiction in Magic Tree House® Fact Tracker: Dinosaurs. It’s two favorite ebooks in one! Find out why Mary Pope Osborne’s #1 New York Times bestselling series is such a hit with kids, parents, and teachers around the world.