<b>Meet Jackie Robinson and solve a mystery in the #1 bestselling Magic Tree House chapter book series! </b><br> <br> PLAY BALL! Jack and Annie aren’t great baseball players . . . yet! Then Morgan the librarian gives them magical baseball caps that will make them experts. They just need to wear the caps to a special ballgame in Brooklyn, New York. The magic tree house whisks them back to 1947! <br> <br> When they arrive, Jack and Annie find out that they will be batboys in the game—not ballplayers. What exactly does Morgan want them to learn? And what’s so special about <i>this</i> game? They only have nine innings to find out!<br> <br> Discover history, mystery, humor, and baseball in this one-of-a-kind adventure in Mary Pope Osborne’s <i>New York Times</i> bestselling Magic Tree House series lauded by parents and teachers as books that encourage reading.<br> <br> Magic Tree House books, with fiction and nonfiction titles, are perfect for pa