| # | Book Title | Author | |
|---|---|---|---|
| 1 | Disappearing Stranger | Johnson, Lois Walfrid | |
| 2 | Hidden Message | Johnson, Lois Walfrid | |
| 3 | Creeping Shadows | Johnson, Lois Walfrid | |
| 4 | Vanishing Footprints | Johnson, Lois Walfrid | |
| 5 | Trouble at Wild River | Johnson, Lois Walfrid | |
| 6 | Mysterious Hideaway | Johnson, Lois Walfrid | |
| 7 | Grandpa's Stolen Treasure | Johnson, Lois Walfrid | |
| 8 | Runaway Clown | Johnson, Lois Walfrid | |
| 9 | Mystery of the Missing Map | Johnson, Lois Walfrid | |
| 10 | Disaster on Windy Hill | Johnson, Lois Walfrid |