Operation Fortitude, the British plan to keep the Germans from knowing their exact plans for D-Day and the storming of Normandy could not have been as successfully executed without the stable of double cross spies and their British spymasters.
In his inimitable style, Ben McIntyre offers us a window into the minds of the some of the most creative military strategists on British soil. He offers us character studies into the heroic and indomitable spirits behind the Anti-Nazi men and women who had to keep their covers under dangerous situations, preventing their double identity being discovered by the Germans. The author also takes into the evaluation process of considering the suitability of converting German spies as double agents, why some are accepted and the characteristics that make others a bigger risk or completely unsuitable.
It's not all nerve-wrecking tension in the book though. There are some moments of levity, such as the chapter where the author describes the homing pigeon strategies and the unforeseen end of the one and only heroic pigeon, Gustav, who carried a message back from Normandy to the British.
The difference between this and some of the author's other books is that there wasn't a continuous flow between the chapters. They read a little like index cards on individual agents or certain events. It took a little while to get used to the rather abrupt starts and ends to each chapter, but this did not in any way detract from my overall enjoyment of the book.