The period from September 1939 to early 1942 was crucial for Soviet foreign policy and coincided with the early stages of the Second World War, including the Great Patriotic War. In Stalin’s Great Game, Michael Jabara Carley unpacks the complexities of Soviet diplomacy during this time, addressing key issues such as the Soviet-Finnish Winter War, Soviet views on the fall of France and the Battle of Britain, efforts to remain neutral in Europe, Soviet relations with both Britain and Nazi Germany, and the formation of the Grand Alliance against the Axis powers. Drawing on extensive research from multilingual archives in France, Britain, the United States, and the USSR, Carley offers a comprehensive narrative that explores Soviet intelligence activities, especially of the “Cambridge Five” spy ring and Nazi Germany’s preparations for Operation Barbarossa, the invasion of the Soviet Union. The book also re-evaluates historiographical debates on Stalin’s interpretation of Soviet intelligence and Hitler’s intentions towards the USSR. The third volume in Carley’s trilogy on the origins and early conduct of the Second World War, Stalin’s Great Game provides a fresh re-examination of key events and interpretations by both Western and Soviet historians, introducing new ideas and perspectives on this critical period.