Co-author of Tom Clancy's Jack Ryan novels Mark Greaney returns to deadly assassin character the Gray Man, as Court Gentry goes after the Syrian president while also attempting to help the president's heir out of the situation alive Mark Greaney, the #1 New York Times bestselling co-author of Tom Clancy's Jack Ryan novels, delivers another breakneck thriller following the world's deadliest assassin - the Gray Man...
