Paddy Costello was a scholar, a soldier, a diplomat, a maverick, an exemplary father, a lover of good wine. But this fascinating biography also asks was he a spy? Auckland. Cambridge. Moscow. Paris. New Zealand's 'most brilliant linguist and ablest foreign envoy'. The man who alerted the West to Soviet possession of the atom bomb. The first Allied diplomat to enter and report on the Nazi death camps at the end of the war. General Freyberg's favourite Intelligence officer. This masterful biography explores the truth behind the rumours and reveals a fascinating man.