Ghosts :："A nonfiction companion to Magic Tree House #42: A Good Night for Ghosts." / Space：a nonfiction companion to Magic tree house #8, Midnight on the moon Ghosts：a nonfiction companion to a good night for ghosts 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 / "A nonfiction companion to Magic Tree House #51: High Time for Heroes." Baseball：A nonfiction companion to Magic Tree House #29: A Big day for Baseball. a nonfiction companion to Magic tree house #5 : Night of the ninjas Rain forests :：A nonfiction companion to magic tree house #6, Afternoon on the Amazon /