It’s Throwback Thursday! Sixty years ago this month, The Unlikely Spy by Daniel Silva was first published.

“In wartime,” Winston Churchill wrote, “truth is so precious that she should always be attended by a bodyguard of lies.” For Britain’s counterintelligence operations, this meant finding the unlikeliest agent imaginable—a history professor named Alfred Vicary, handpicked by Churchill himself to expose a highly dangerous, but unknown, traitor. The Nazis, however, have also chosen an unlikely agent. Catherine Blake is the beautiful widow of a war hero, a hospital volunteer—and a Nazi spy under direct orders from Hitler: uncover the Allied plans for D-Day…