Mark Greaney

Mark Greaney is an American author best known for the Gray Man series of action thrillers, which follow assassin and CIA operative Court Gentry. Greaney also co-wrote some of Tom Clancy's final works and continued the Ryanverse after Clancy's death in 2013, carrying it on until 2017. Titles such as The Gray Man, On Target, and Dead Eye trace Gentry through covert missions across the globe.