This is a 14-volume magnum opus by the British historian E. H. Carr, published betwen 1950 and 1978. It is considered a definitive work on the subject in English.
Previous histories have focused on the KGB, leaving military intelligence and the special service-which specialized in codes and ciphers-lurking in the shadows. Drawing on previously neglected Russian sources, Haslam reveals how both were in fact crucial to the survival of the Soviet state. This was especially true after Stalin's death in 1953, as the Cold War heated up and dedicated Communist agents the regime had relied upon-Klaus Fuchs, the Rosenbergs, Donald Maclean-were betrayed. In the wake of these failures, Khrushchev and his successors discarded ideological recruitment in favor of blackmail and bribery.