Super Short Summary

Double Cross: The True Story of the D-Day Spies by Ben Macintyre details the British response to Nazi spies sent by the German Abwehr intelligence service and efforts to turn those spies into double agents. The key endeavor chronicled in the book involves British efforts to trick the Germans into believing the 1944 D-Day Invasion would take place in Pas de Calais rather than Normandy Beach in a feat known as Operation Fortitude.