Knights and castles：a nonfiction companion to the knight at dawn Knights and castles：A nonfiction companion to Magic Tree House #2: The Knight at Dawn Nonfiction companion to the knight at dawn Dolphins and sharks：a nonfiction companion to Dolphins at daybreak Penguins and Antarctica：a nonfiction companion to Eve of the emperor penguins Snakes and other reptiles /：a nonfiction companion to A Crazy with Cobras Snakes and other reptiles：a nonfiction companion to A crazy day with cobras Titanic：a nonfiction companion to Tonight on the Titanic Penguins and Antarctica :：a nonfiction companion to Eveof the emperor penguins / Ninjas and samurai：a nonfiction companion to Magic tree house #5 : Night of the ninjas