| # | Book Title | Author | |
|---|---|---|---|
| 1 | Message in Montana | Schaller, Bob | |
| 2 | South Dakota Treaty Search | Schaller, Bob | |
| 3 | Crime in a Colorado Cave | Schaller, Bob | |
| 4 | Adventure in Wyoming | Schaller, Bob | |
| 5 | Treasure in Texas | Schaller, Bob | |
| 6 | Mystery in Massachusetts | Schaller, Bob | |
| 7 | Great Florida Chase, The | Schaller, Bob | |
| 8 | California Gold Rush Fever | Schaller, Bob |