The Executioner's Game by Gary Hardwick

Luther Green is a government assassin working for an agency known as E-1. Luther is called off his current mission from somewhere overseas and brought back to America. The director of E-1 personally assigns him to a new assignment--find and kill the man who trained Luther as an agent, Alex Deaver.

Although Luther accepts the task, he finds that the director's behavior and the assignment odd. Deaver leads Luther on a cat and mouse chase that takes the reluctant assassin back to hometown, Detroit. It places Luther at a disadvantage because he has family and friends living in the city. Deaver's knows this and is willing to place Luther's family in the line of fire if he has to.
Deaver's leaves clues for Luther to discover while they play their Executioner's Game. And soon Luther finds that everything at E-1 is not what it appears to be.

Gary Hardwick's 'The Executioner's Game' is an exciting, fast-pace read, with interesting characters and a government assassin with a style all his own. Well worth the read.