| #2 |  The GCHQ Puzzle Book
| 5 | 2 reads | |
| #3 |  Bletchley Park Brainteasers
| 0 | 1 read | |
| #4 |  Escape Room Puzzles
| 0 | 1 read | |
| #5 |  Journal 29: Revelation
| 0 | 1 read | |
| #6 |  The Sherlock Holmes Escape Book
| 3 | 2 reads | |
| #7 |  Trip 1907
| 0 | 1 read | |
| #8 |  Codex Enigmatum
| 0 | 1 read | |
| #9 |  The Escape Book
| 2 | 3 reads | |
| #10 |  Only Connect
| 0 | 1 read | |
| #11 |  Richard Osman's House of Games
| 0 | 1 read |