A New York Times Bestselling AuthorOn a dark summer night, two Chechen mercenaries emerge from the waters off Nantucket to kill a high-value target, former U.S. president Jake Cazalet. Unfortunately for them, Cazalet has guests, including black ops specialist Sean Dillon and his colleague, Afghan war hero Captain Sara Gideon. The Chechens do not survive the night, but Dillon is curious as to how they even got on the island. And what he discovers sends a chill through his bones.