Leonardo da Vinci：a nonfiction companion to Monday with a mad genius Leonardo da Vinci :：a nonfiction companion to Magic Tree House #38: Monday with a mad genius / Nonfiction companion to Monday with a mad genius Titanic：a nonfiction companion to Tonight on the Titanic Penguins and Antarctica：a nonfiction companion to Eve of the emperor penguins Ghosts：a nonfiction companion to a good night for ghosts Sea monsters /：a nonfiction companion to Dark day in the deep sea.