The riveting story of the ring of spies known as the Cambridge Five, who infiltrated the highest levels of the British establishment and helped Stalin cement a half century of Soviet domination over Eastern Europe The Cambridge Five was the most infamous spy ring in history. Its members—Kim Philby, Anthony Blunt, Donald Maclean, Guy Burgess, and John Cairncross—met at university, amid the left-wing ferment overtaking British campuses between the World Wars. The Five were soon recruited by Soviet agents and pledged allegiance to Stalin, and each quickly took up a place in the British government. From the 1930s, they funneled top-secret intelligence to the USSR, some so sensitive that their Soviet handlers feared a double cross. Their unmasking in 1951 rocked Britain, helping to end a chummy, boys' club stranglehold on the country's institutions of power. But, as Antonia Senior shows, the Five's treachery had much graver and more devastating consequences across the world. Their work invaluably aided Stalin as he sought to build a Red Empire, condemning millions across Eastern Europe to decades of repression, violence, and death. Rife with code names, smuggled documents, clandestine rendezvous, and copious amounts of gin, Stalin's Apostles wields impeccable research and storytelling and all the thrilling details and high tragedy of a classic spy thriller.