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Mark Greaney

Mark Greaney has a degree in international relations and political science. In his research for the Gray Man novels he has travelled to more than fifteen countries and trained alongside military and law enforcement in the use of firearms, battlefield medicine, and close-range combative tactics. He is also the author of seven New York Times Tom Clancy bestsellers, including three written with Clancy: Locked On, Threat Vector, and Command Authority.

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