Because it is ...

Threat - Hugh Fraser

... bugging me like nothing else that book # 1 ("Harm") in this series is still in my head with way too many questions to be answered.

 

Given the prospective setting of book # 2 (hired assassin, in the mid-1960s), I would not be surprised if it ends up reminding me of a Bond novel ... with a main character that is much more fun.