Sea monsters /：a nonfiction companion to Dark day in the deep sea. Dinosaurs：a nonfiction companion to Dinosaurs before dark Rain forests：a nonfiction companion to Afternoon on the Amazon Ghosts：a nonfiction companion to a good night for ghosts The other title：Nonfiction companion to Shadow of the shark Titanic：a nonfiction companion to Tonight on the Titanic Leonardo da Vinci：a nonfiction companion to Monday with a mad genius