BOOK #17: TONIGHT ON THE TITANIC: Jack and Annie are whisked away to the decks of the Titanic, where they must help two children find their way to a lifeboat - and are in danger of becoming victims of that tragic night themselves.BOOK #18: BUFFALO BEFORE BREAKFAST: Jack and Annie travel to the Old West, where they roam the Great Plains with a Lakota boy.BOOK #19: TIGERS AT TWILIGHT: While in India, Jack and Annie have adventures involving a tiger and other endangered jungle animals.BOOK #20: DINGOES AT DINNERTIME: Jack and Annie are whisked Down Under to the land of Australia, where they save several animals from a raging wildfire.BOOK #21: CIVIL WAR ON SUNDAY: Jack and Annie are transported to the time of the Civil War, where they meet Clara Barton.BOOK #22: REVOLUTIONARY WAR ON WEDNESDAY: Jack and Annie travel back to the time of the American Revolution and help Gen. George Washington during his famous crossing of the Delaware River.BOOK #23: TWISTER ON TUESDAY: Jack and Annie travel back to the Kansas prairie and gain an understanding of how hard life was for pioneers when they experience the terror of a tornado.BOOK #24: EARTHQUAKE IN THE EARLY MORNING: The Magic Tree House takes Jack and Annie to San Francisco in 1906, in time for them to experience one of the biggest earthquakes the United States had ever known.