| #2 |  Sweet Tooth
| 2.96 | 50 reads | |
| #3 |  Slow Horses
| 3.86 | 196 reads | |
| #4 |  Warlight
| 3.55 | 25 reads | |
| #5 |  Transcription
| 3.46 | 69 reads | |
| #6 |  American Spy
| 3.6 | 51 reads | |
| #7 |  An Officer and a Spy
| 4.11 | 23 reads | |
| #8 |  Spook Street
| 4.09 | 60 reads | |
| #9 |  The Matchmaker The Matchmaker: A Spy in Berlin
| 3 | 4 reads | |
| #10 |  The Eyes of the Queen
| 3 | 3 reads |