Hachette Book Group USA Baldacci, D: The Hit

When a government assassin turns rogue and begins hunting down the other members of his unit, Will Robie is called in to stop him. But as Robie digs into the man's background, he begins to wonder if the rogue hitman's actions are justified...and then the hitman goes after the one person Robie really cares about. All bets are off in the fight to the end between two men who specialize in one thing: killing.