Matthew Dunn

Matthew Dunn was a former MI6 officer who worked in hostile locations around the world. He is the author of the espionage novels "Slingshot," "Spycatcher," "Sentinel," "Counterspy," "Dark Spies," "Spy House," and the forthcoming "A Soldier’s Revenge" (William Morrow). For more information visit matthewdunnbooks. You can also follow Mr. Dunn on Twitter @MatthewHDunn and find him on on Facebook.