1. The Bobbsey Twins 2. ....in the Country 3. ....at the Seashore 4. ....at School 5. ....at Snow Lodge 6. ....on a Houseboat 7. ....at Meadow Brook 8. ....at Home 9. ....in a Great City 10. ....on Blueberry Island 11. ....on the Deep Blue Sea 12. ....in Washington 13. ....in the Great West 14. ....at Cedar Camp 15. ....at the Country Fair 16. ....Camping Out 17. ....and Baby May 18. ....Keeping House 19. ....at Clover Bank 20. ....at Cherry Corners 21. ....and their School Mates 22. ....Treasure Hunting 23. ....at Spruce Lake 24. ....Wonderful Secret

25. ....at the Circus 26. ....on an Airplane Trip 27. ....Solve A Mystery 28. ....on a Ranch 29. ....in Eskimo Land 30. ....in a Radio Play 31. ....at a Windmill Cottage 32. ....at Lighthouse Point 33. ....at Indian Hollow 34. ....at The Ice Carnival 35. ....in the Land of Cotton 36. ....in Echo Valley  37. ....on the Pony Trail 38. ....at Mystery Mansion 39. ....at Sugar Maple Hill 40. ....in Mexico 41. ....Toy Shop 42. ....in Tulip Land 43. ....in Rainbow Valley 44. ....Own Little Railroad 45. ....at White Sail Harbor 46. ....and the Horseshoe Riddle 47. ....at Big Bear Pond 48. ....on a Bicycle Trip

49. ....Own Little Ferryboat 50. ....at Pilgrim Rock 51. ....Forest Adventure 52. ....at London Tower 53. ....in the Mystery Cave 54. ....in Volcano Land 55. ....and the Goldfish Mystery 56. ....and the Big River Mystery 57. ....and the Greek Hat Mystery 58. ....Search for the Green Rooster 59. ....and Their Camel Adventure 60. ....Mystery of the King's Puppet 61. ....and the Secret of Candy Castle 62. ....and the Doodlebug Mystery 63. ....and the Talking Fox Mystery 64. ....The Red, White & Blue Mystery 65. ....Dr. Funnybone's Secret 66. ....and the Tagalong Giraffe 67. ....and the Flying Clown 68. ....on the Sun-Moon Cruise 69. ....the Freedom Bell Mystery 70. ....the Smokey Mountain Mystery 71. ....in a TV Mystery Show 72. ....the Coral Turtle Mystery