Knights and castles：A nonfiction companion to Magic Tree House #2: The Knight at Dawn Knights and castles：a nonfiction companion to the knight at dawn Ninjas and samurai：a nonfiction companion to Magic tree house #5 : Night of the ninjas Ninjas and samurai :：a nonfiction companion to Magic tree house #5 : Night of the ninjas / Mummies and pyramids：a nonfiction companion to Magic tree house #3: Mummies in the morning Dolphins and sharks：a nonfiction companion to Magic Tree House #9: Dolphins at daybreak Abraham Lincoln：A nonfiction companion to Magic tree house, #47: Abe Lincoln at last! Mummies and pyramids：a nonfiction companion to Magic tree house # 3, Mummies in the morning Space：a nonfiction companion to Magic tree house #8, Midnight on the moon The other title：a nonfiction companion to Magic tree house #54, Balto of the Blue Dawn