| #3 |  I Am N
| 4.5 | 2 reads | |
| #6 |  Race to the Bottom of the Earth: Surviving Antarctica
| 0 | 0 reads | |
| #7 |  Against All Odds
| 4 | 7 reads | |
| #8 |  Even Now
| 3.29 | 9 reads | |
| #9 |  Secret Agent Brainteasers: More Than 100 Codebreaking Puzzles Inspired by Britain's Espionage Masterminds
| 0 | 0 reads |