Hugh Trevor-Roper's experiences working for the Secret Intelligence Service (MI6) during the war had a profound impact on him and he later observed the world of intelligence with particular sharpness. To him, the subject of wartime espionage was as worthy of profound investigation and reflection as events from the more distant past. Expressing his observations through some of his most ironic and entertaining prose, Trevor-Roper wrote with a freedom he could not express publicly due to the Official Secrets Act. Based on previously unpublished material - including an extraordinary and previously-unseen correspondence with the exiled spy Kim Philby - this book is a sharp, revealing and personal first-hand account of the intelligence world in World War II and its aftermath.

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Hugh Trevor-Roper was the most brilliant historian of his generation. He received a life peerage in 1979. He was the author of numerous books, including his famous investigation of Hitler’s last days. During World War II, Trevor-Roper served in the Secret Intelligence Service, giving him a remarkable insight into the work of the intelligence services in Britain. A collection of his diaries – The Wartime Journals – has recently been published.