| # | Book Title | Author | ||
|---|---|---|---|---|
| 1 | Mystery of the Madman at Cornwall Crag, The | Carlson, Dale Bick | ||
| 2 | Secret of Operation Brain, The | Carlson, Dale Bick | ||
| 3 | Mystery of the Lost Princess, The | Carlson, Dale Bick | ||
| 4 | Mystery of Galaxy Games, The | Carlson, Dale Bick |
| # | Book Title | Author | ||
|---|---|---|---|---|
| 1 | Mystery of the Shining Children, The | Carlson, Dale Bick | ||
| 2 | Mystery of the Hidden Trap, The | Carlson, Dale Bick | ||
| 3 | Secret of the Third Eye, The | Carlson, Dale Bick | ||
| 4 | Secret of the Invisible City, The | Carlson, Dale Bick |