Last Contract — Clark Howard

A hit man tries to make a clean break from his murderous career in this chilling novel from an award-winning author.
 
He has no police record, not even a traffic ticket. But he's killed twenty-seven people during his career as a professional assassin. And sometimes it's not just the target who takes a bullet -- if the bodyguard or mistress is unfortunate enough to be around. When the time comes, it happens fast: assemble the weapon, load, ditch the evidence.
 
Now he wants out -- but the people he works for may not allow that -- in this suspenseful thriller from a crime writer whose works have earned numerous honors, including an Edgar Award and two Shamus Award nominations, and been adapted for film and television.