something about J.C. Masterman's "The Double Cross System in the War of 1939 to 1945"

The Double Cross System in the War of 1939 to 1945 is a report on an anti-espionage program run by the British intelligence and security service MI5 during World War II; MI5 recruited and employed Nazi agents in Britain to disseminate disinformation back to the German Government. (Bits of legitimate intelligence were mixed in to lend the double agents credibility with the regime.) This nonfiction work relates methods, the anonymous people who used them, and various operations, successes, and failures.

The author of this report, John Cecil Masterman, was integral to the program. Masterman, an academic who was drafted into clandestine government service, reports that the program was mostly a success. Masterman's writing is also a success, albeit a modest one. Dry in its telling, the narrative does not require a lot of chewing; it's mercifully brief.