Mummies and pyramids：a nonfiction companion to Magic tree house # 3, Mummies in the morning Mummies and pyramids：a nonfiction companion to Magic tree house #3: Mummies in the morning Ninjas and samurai：a nonfiction companion to Magic tree house #5 : Night of the ninjas Space：a nonfiction companion to Magic tree house #8, Midnight on the moon Ninjas and samurai :：a nonfiction companion to Magic tree house #5 : Night of the ninjas / Dolphins and sharks：a nonfiction companion to Magic Tree House #9: Dolphins at daybreak Titanic：a nonfiction companion to Magic Tree House #17: Tonight on the Titanic a nonfiction companion to Magic tree house #8, Midnight on the moon Dog heroes：a nonfiction companion to Magic tree house #46: Dogs in the dead of night Knights and castles：A nonfiction companion to Magic Tree House #2: The Knight at Dawn