What pushed Blunt, Burgess, Cairncross, Maclean and Philby into Soviet hands? With access to recently released papers and other neglected documents,this sharp analysis of the intelligence world examines how and why these men and others betrayed their country and what this cost Britain and its allies. Enemies Within is a new history of the influence of Moscow on Britain told through the stories of those who chose to spy for the Soviet Union. It also...