In 1941, the United Kingdom faced its darkest hour: it stood alone against the Germans, who had chased British forces out of France, Norway, and Greece. All it had left were desperate measures--commando raids, intelligence coups, feats of derring-do. Any such "novel enterprise," wrote Admiral John Godfrey, Director of Naval Intelligence, required "an officer with drive and imagination of the highest order." He found one in Commander Ian Fleming. In...