| # | Book Title | Author | |
|---|---|---|---|
| 1 | Mysterious Treasure Map, The | Robinson, Glen | |
| 2 | Case of the Secret Code, The | Robinson, Glen | |
| 3 | Jenny's Cat-Napped Cat | Walker, Celeste P. | |
| 4 | Missing Combination Mystery, The | Stoffle, Eric D. | |
| 5 | Broken Dozen Mystery, The | Robinson, Glen | |
| 6 | Wedding Dress Disaster, The | Stoffle, Eric D. | |
| 7 | Clue in the Secret Passage, The | Robinson, Glen | |
| 8 | Rock Slide Mystery, The | Zaugg, Sandra L. | |
| 9 | Secret of the Hidden Room, The | Speck, Nancy | |
| 10 | Adventure on Wild Horse Mountain | Stoffle, Eric D. | |
| 11 | Rattlesnake River Adventure | Zaugg, Sandra L. | |
| 12 | Mystery of the Abandoned Lighthouse | Perdew, Suzanne Grant |