The Magic Treehouse Series By Mary Pope Osborne #1 Dinosaurs Before Dark-- Jack and Annie discover the magic treehouse, and find themselves back in the days of the dinosaurs. #2 The Knight at Dawn-- Jack and Annie travel back to the Middle Ages and explore a castle. #3 Mummies in the Morning-- Jack and Annie go back to ancient Egypt. #4 Pirates Past Noon-- Jack and Annie have a seafaring adventure, complete with a secret map and hidden gold. #5 Night of the Ninjas-- Jack and Annie travel to feudal Japan and learn the ways of the Ninja. #6 Afternoon on the Amazon-- Jack and Annie visit the Amazon rain forest and run into giant ants, piranhas, crocodiles, and jaguars. #7 Sunset of the Sabertooth-- Jack and Annie travel back to the Ice Age and meet Cro-Magnons, cave bears, sabertooth tigers, and woolly mammoths. #8 Midnight on the Moon-- Jack and Annie visit a moon base in the future. #9 Dolphins at Daybreak-- Jack and Annie go under the sea to try to solve an ancient riddle. #10 Ghost Town at Sundown-- Jack and Annie visit the old West. #11 Lions at Lunchtime-- Jack and Annie meet many wild animals on an African adventure. #12 Polar Bears Past Bedtime-- Jack and Annie go to the Arctic. #13 Vacation Under the Volcano-- Jack and Annie travel to ancient Pompeii, just before Mount Vesuvius erupts. #14 Day of the Dragon King-- Jack and Annie go to ancient China and try to save an ancient legend before the Imperial Library is destroyed. #15 Viking Ships at Sunrise-- Jack and Annie visit an Irish monastery in the Middle Ages. #16 Hour of the Olympics-- Jack and Annie visit ancient Greece in time for the original Olympic Games. #17 Tonight on the Titanic-- Jack and Annie go aboard the Titanic and try to free a dog from a mysterious spell. #18 Buffalo Before Breakfast-- Jack and Annie visit the Great Plains and learn about the Lakota people. #19 Tigers at Twilight-- Jack and Annie travel to India. #20 Dingoes at Dinnertime-- Jack and Annie try to save animals from a wildfire in Australia. #21 Civil War on Sunday-- Jack and Annie meet Clara Barton when they find themselves in the Civil War. #22 Revolutionary War on Wednesday-- Jack and Annie help George Washington cross the Delaware River. #23 Twister on Tuesday-- Jack and Annie travel to Kansas and experience pioneer life and a very scary tornado. #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.