Mark Greaney was born on October 25, 1967, and is an American author best known for his action-packed Gray Man series. His writing style is characterized by intricate plots, intense action sequences, and realistic portrayals of espionage and military operations. Greaney frequently co-writes with other authors, notably Tom Clancy, contributing to the Jack Ryan universe with works like 'Threat Vector' and 'Locked On,' both of which achieved New York Times bestseller status.























































































































