Read the adventure and track the facts—it's two great ebooks in one! Join Jack and Annie as they travel to ancient Greece to meet Alexander the Great and his famous horse in Magic Tree House® #49: Stallion by Starlight. Then uncover the facts behind the fiction in Magic Tree House® Fact Tracker: Horse Heroes. 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.