| # | Book Title | Author | |
|---|---|---|---|
| 1 | Secret of Robber's Cave, The | Gregory, Kristiana | |
| 2 | Clue at the Bottom of the Lake, The | Gregory, Kristiana | |
| 3 | Legend of Skull Cliff, The | Gregory, Kristiana | |
| 4 | Haunting of Hillside School, The | Gregory, Kristiana | |
| 5 | Blizzard on Blue Mountain, The | Gregory, Kristiana | |
| 6 | Secret of the Junkyard Shadow, The | Gregory, Kristiana |