On 3 May 1961 after a trial conducted largely in secret a man named George Blake was sentenced to an unprecedented forty-two years in jail. At the time few details of his crimes were made known. By his own confession he was a Soviet spy & rumours later circulated that his actions had endangered British agents but the reasons for such a severe punishment were never revealed. To the public Blake was simply the greatest traitor of the Cold War. Yet as Roger Hermiston reveals in this thrilling new biography his story touches not only the depths of treachery but also the heights of heroism. In WWII the teenage Blake performed sterling deeds for the Dutch resistance before making a dramatic bid for freedom across Nazi-occupied Europe. Later recruited by British Intelligence he quickly earned an exemplary reputation & was entrusted with building up the Service's networks behind the Iron Curtain. & following a posting to Seoul he also suffered for his adopted country when captured by North Korean soldiers at the height of their brutal war with the South. By the time of his release in 1953 Blake was a hero one of the Service's brightest & best officers. But unbeknownst to SIS they were harbouring a mole. Week after week year after year Blake was assiduously gathering all the important documents he could lay his hands on & passing them to the KGB. Drawing on hitherto unpublished records from his trial new revelations about his dramatic jailbreak from Wormwood Scrubs & original interviews with former spies friends & the man himself The Greatest Traitor sheds new light on this most complex of characters & presents a fascinating shadow history of the Cold War.