A nonfiction companion to Magic Tree House #39: Dark day in the deep sea. "A nonfiction companion to Magic Tree House #39: Dark day in the deep sea." a nonfiction companion to Magic tree house #5 : Night of the ninjas A nonfiction companion to magic tree house #43:Leprechaun in Late Winter A nonfiction companion to magic tree house #6, Afternoon on the Amazon / a nonfiction companion to Magic tree house #8, Midnight on the moon "A nonfiction companion to Magic tree house #53: Shadow of the shark" a nonfiction companion to Magic tree house #23, Twister on Tuesday a nonfiction companion to Magic tree house #22 : Revolutionary War on Wednesday A nonfiction companion to Magic Tree House #29: A Big day for Baseball.