The terror and purges of Stalin's Russia in the 1930s discouraged Soviet officials from leaving documentary records let alone keeping personal diaries. A remarkable exception is the unique diary assiduously kept by Ivan Maisky, the Soviet ambassador to London between 1932 and 1943. This selection from Maisky's diary grippingly documents Britain's drift to war during the 1930s, appeasement in the Munich era, negotiations leading to the signature of the Ribbentrop