| # | Book Title | Author | ||
|---|---|---|---|---|
| 1 | Tale of the Witch Doll | Wirt, Mildred A. | ||
| 2 | Vanishing Houseboat, The | Wirt, Mildred A. | ||
| 3 | Danger at the Drawbridge | Wirt, Mildred A. | ||
| 4 | Behind the Green Door | Wirt, Mildred A. | ||
| 5 | Clue of the Silken Ladder | Wirt, Mildred A. | ||
| 6 | Secret Pact, The | Wirt, Mildred A. | ||
| 7 | Clock Strikes Thirteen, The | Wirt, Mildred A. | ||
| 8 | Wishing Well, The | Wirt, Mildred A. | ||
| 9 | Saboteurs on the River | Wirt, Mildred A. | ||
| 10 | Ghost Beyond the Gate | Wirt, Mildred A. | ||
| 11 | Hoofbeats on the Turnpike | Wirt, Mildred A. | ||
| 12 | Voice From the Cave | Wirt, Mildred A. | ||
| 13 | Guilt of the Brass Thieves | Wirt, Mildred A. | ||
| 14 | Signal in the Dark | Wirt, Mildred A. | ||
| 15 | Whispering Walls | Wirt, Mildred A. | ||
| 16 | Swamp Island | Wirt, Mildred A. | ||
| 17 | Cry at Midnight, The | Wirt, Mildred A. |