This book is simply stunning. It might be the best non-fiction book I’ve ever read about post-war SIS, and Alistair’s unique (an overused word, but in this sense, entirely justified) perspective allows him to draw back the curtain on one of the most secretive organisations in the world, in a way that nobody else has done, or could do. The story of JBW is picaresque, intriguing, dramatic and a window onto the frontlines of World War II and Cold War spying, offering insights I have never before seen on the printed page. It’s also a moving personal story about a son’s attempt to understand his father, and very funny in an understated, British way. This is a book that everyone interested in British Intelligence will devour, shaking their heads in disbelief at the extraordinary stories as they do so