Magic Tree House: Books 42 & 43,Magic Tree House: Books #42-#49: Mary Pope Osborne: 9780545903752: Amazon.com: Books,Amazon.com: Magic Tree House Books 25-28 Boxed Set: 9780399549564: Osborne, Mary Pope: Books,Magic Tree House Collection: Books 49-52: Stallion by Starlight; Hurry Up, Houdini!; High Time for Heroes; Soccer on Sunday (Magic Tree House (R)): Osborne, Mary Pope, Osborne, Mary Pope: 9780449808665: Amazon.com: Books,Amazon | Magic Tree House Books 1-4 Boxed Set | Osborne, Mary Pope | Fantasy & Magic