Really excellent story, would have given it three stars if Chapman's life weren't so interesting because I think the author sort of dumbed it down at points and he could have gone into more detail on the backgrounds of the individuals involved, also the organization of the information got a little convoluted at times. I understand that he didn't want to do a full backstory every time a new person came into play, but inserting several chapters between name and history meant at times I was flipping back (of course, I'm not particularly good at names) to clarify who he was describing. I chose to read this one rather then the other Chapman bio that's currently out, as the other one relies heavily on input from his wife, which can't add that much since Chapman had absolutely nothing to do with her during war time (when everything interesting happened).

In general though you really should read this as it's so improbable that you get the delightful effect of reading non-fiction that feels completely made up. Also WW2 British intelligence was just mindblowingly effective so it's always a good topic.