HEXADECIMALS series
Hexadecimals #1: After Kelly (2008)
Hexadecimals #2: Before Kelly #1 (2008)
Hexadecimals #3: Before Kelly #2 (2008)
Hexadecimals #4: Before Kelly #3 (2008)
Not Search But Find (2010)
The Decisive Moment (2017)
The Last Date (2000)