The diary of Ivan Maisky, Soviet ambassador to London between 1932 and 1943, grippingly documents Britain’s drift to war during the 1930s, appeasement in the Munich era, negotiations leading to the signature of the Ribbentrop–Molotov Pact, Churchill’s rise to power, the German invasion of Russia, and the intense debate over the opening of the second front. Maisky was distinguished by his great sociability and access to the key players in British public life.