Sierra Six

It"'s been years since the Gray Man"'s first mission, but the trouble"'s just getting started in the latest entry in the #1 New York Times bestselling series. Before he was the Gray Man, Court Gentry was Sierra Six, the junior member of a CIA action team.   In their first mission they took out a terrorist leader, at a terrible price. Years have passed. The Gray Man is on a simple mission when he sees a ghost: the long-dead terrorist, but he"'s remarkably energetic for a dead man.  A decade of time hasn"'t changed the Gray Man. He isn"'t one to leave a job unfinished or a blood debt unpaid.