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Gray Man Thriller Series 6 books Set Collection By Mark Greaney Roald Dahl But how could the killerTitles In this Set: Dead Eye On Target Ballistic Back Blast The Gray Man Gunmetal Grey DEAD EYEEx CIA master assassin Court Gentry has always prided himself on his ability to disappear at will, to fly below the radar and exist in the shadows to survive as the near mythical Gray Man. But when he takes revenge upon a former employer who betrayed him, he exposes himself to something hes never had to face before. A killer who is just like him. Code named