A review by srash
The Double-Cross System in the War of 1939-1945 by Norman Holmes Pearson, J.C. Masterman

4.0

Decided to reread this after reading Marks's book. Masterman focuses specifically on how the British infiltrated the German spy system in England and turned the agents into double agents. This was written as a government report shortly after the war ended, so in many ways, it reads like a report, but Masterman has a sly sense of humor that periodically pops up. And the topic itself is fascinating as he relates stories of staged sabotage and deception. Masterman also matter of factly gives practical tips on how to run a double agent system, which isn't practical advice for most people, but it is still interesting.