| # | Book Title | Author | ||
|---|---|---|---|---|
| 2 | Codes & Ciphers | Fowler, Mark | ||
| 3 | Logic Puzzles | Fowler, Mark |
| # | Book Title | Author | ||
|---|---|---|---|---|
| 17 | Invisible Spy, The | Fowler, Mark | ||
| 18 | Emerald Conspiracy, The | Fowler, Mark |
Juvenile Series and Sequels
| # | Book Title | Author | ||
|---|---|---|---|---|
| 2 | Codes & Ciphers | Fowler, Mark | ||
| 3 | Logic Puzzles | Fowler, Mark |
| # | Book Title | Author | ||
|---|---|---|---|---|
| 17 | Invisible Spy, The | Fowler, Mark | ||
| 18 | Emerald Conspiracy, The | Fowler, Mark |