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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, including Agent in Place, Gunmetal Gray, Back Blast, Dead Eye, Ballistic, On Target, and The Gray Man, he traveled 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 the New York Times bestsellers Tom Clancy Support and Defend, Tom Clancy Full Force and Effect, Tom Clancy Commander in Chief, and Tom Clancy True Faith and Allegiance. With Tom Clancy, he coauthored Locked On, Threat Vector, and Command Authority.

Mark Greaney
Mark Greaney is the bestselling author of The Gray Man series and worked with Tom Clancy on some of his novels, both before and after Clancy's death. The Gray Man was adapted into a Netflix series in 2022. Greaney collaboared with Clancy on Locked On, Vector, and Command Authority. After Clancy's death, Greaney continued writing about Jack Ryan with Tom Clancy: Support and Defend, Tom Clancy: Full Force and Effect, Tom Clancy: Commander in Chief, and Tom Clancy: True Faith and Allegiance. He has also written standalone novels, including a military thriller, Red Metal.