Donald Nichols was 'a one man war', according to his US Air Force commanding general. He won the Distinguished Service Cross, along with a chest full of medals for valour and initiative in the Korean War. His commanders described Nichols as the bravest, most resourceful and effective spymaster of that forgotten war. But there is far more to Donald Nichols' story than first meets the eye. In 'King of Spies', author Blaine Harden reveals one of the most astonishing - and previously untold - spy stories of the 20th century.