The Green Mamba

In the dark green heart of Southeast Asia, an honest but unwary Englishman, Andrew Finch, is drawn into a twilight world of betrayal, deceit - and murder.
Meet Bullen, bold, brash and booming, an ex-CIA man operating on the far side of legal, a fixer-for-hire, the guy who gets things done. And what Bullen needs right now is an unsuspecting accomplice to help him trap a deadly assassin, The Green Mamba.
So, at an airport in Cambodia, he hooks onto Andrew Finch, a damaged man passing through a damaged country - and he offers Finch not only the solution to his money troubles but also the chance of the Adventure of a Lifetime.

But, in Bullen's world, nothing is ever quite as it seems - and neither he nor Finch have ever encountered anyone like the Green Mamba.
Everyone should have one Adventure of a Lifetime.
Ideally, it shouldn't be the last thing they'll ever do.