TRIPLEX: Secrets from the Cambridge Spies (repost)

TRIPLEX reveals more clearly than ever before the precise nature and extent of the damage done to the much-vaunted British intelligence establishment during World War II by the notorious “Cambridge Five” spy ring—Kim Philby, Donald Maclean, Guy Burgess, Anthony Blunt, and John Cairncross. The code word TRIPLEX refers to an exceptionally sensitive intelligence source, one of the most closely guarded secrets of the war, which appears nowhere in any of the British government’s official histories.