MARY POPE OSBORNE is the author of the New York Times number one bestselling Magic Tree House series as well as co-author of the Magic Tree House Fact Tracker series, along with her husband, Will, and her sister, Natalie Pope Boyce. a For more information, visit the Magic Tree House website at MagicTreeHouse.com!
"A Big Day For Baseball is a grand slam. . . The Magic Tree House series continues with Mary Pope Osborne's latest book, A Big Day for Baseball. Jack and Annie's time travel adventures take them back to Jackie Robinson's time in the majors. A Big Day for Baseball has a number of twists and turns that will keep readers on their toes as the story unfolds." --Sports Illustrated Kids