'The pre-eminent historian of the secret world . . .' Mick Herron, author of Slow HorsesFrom the multi-million copy bestselling historian, the remarkable, unknown Cold War story of how one spy saved the world from nuclear warThe year is 1981. Tehran is in violent turmoil in the wake of the Iranian Revolution. The Soviets are planning to overthrow the Ayatollah's fledgling Islamist regime. If they do so, one response from America - unknown to the public - would be to use nuclear weapons. This is the story of how at the height of the Cold War, one mysterious double agent, known to MI6 as 'Redwood', revealed the Kremlin's secret plot and prevented Armageddon.This unsung, hitherto unknown hero of the Cold War, a six-foot-four Russian intelligence officer, had a problem, a sexual secret, one that if revealed, would turn his life upside-down. So he reached out to MI6, believing it to have the only solution - in return for the KGB's deepest secrets. And then, facing exposure, he demanded...

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