The fun adventures and intriguing mysteries of the Bobbsey Twins can be found in a series of 72 children's novels. They were written under the pseudonym Laura Lee Hope between 1904 and 1979, with a separate series of 30 books published from 1987 through 1992. The stories tell of the adventures of two sets of fraternal twins: Bert and Nan, who were 12 years old, and Flossie and Freddie, who were six. This edition brings together in a single book the first fifteen stories: 1. The Bobbsey Twins, or Merry Days Indoors and Out, 1904 2. The Bobbsey Twins in the Country, 1907 3. The Bobbsey Twins at the Seashore, 1907 4. The Bobbsey Twins at School, 1913 5. The Bobbsey Twins at Snow Lodge, 1913 6. The Bobbsey Twins on a Houseboat, 1915 7. The Bobbsey Twins at Meadow Brook, 1915 8. The Bobbsey Twins at Home, 1916 9. The Bobbsey Twins in a Great City, 1917 10. The Bobbsey Twins on Blueberrry Island, 1917 11. The Bobbsey Twins on the Deep Blue Sea, 1918 12. The Bobbsey Twins in Washington, 1919 13. The Bobbsey Twins in the Great West, 1920 14. The Bobbsey Twins at Cedar Camp, 1921 15. The Bobbsey Twins at the County Fair, 1922 So enjoy, once again, these magnificent stories.