The gray man

"Courtland Gentry is a good man. But he's a great assassin...To those who lurk in the shadows, he's known as the Gray Man. He is a legend in the covert realm, moving silently from job to job, accomplishing the impossible and then fading away. And he always hits his target. Always. But there are forces more lethal than Gentry in the world. Forces like money. And power. And there are men who hold these as the only currency worth fighting for. And in their eyes, Gentry has just outlived his usefulness. But Court Gentry is going to prove that, for him, there's no gray area between killing for a living and killing to stay alive...."--p.[4] of cover.