The Chair of the Cambridge History Faculty reveals the full extent of the KGB's operations to infiltrate ad destabalize the West, from the formation of the Soviet Republic through the Cold Ward to Perestroika. Previously suppresed material contained in the extraordinary records of the defector Vassili Mitrokhin reveals the farcical truth about Philby, the attempts to recuit Harold Wilson, to scilence Sakharov and Solzhenitsyn and to ward of the influence of John Paul II.