Book excerpt: To MI5 he was known as Garbo, though his aliases were many. But who, exactly, was Juan Pujol? Jason Webster tells of Pujol's early life in Spain and how, after the Civil War, a determination to fight totalitarianism took him on his strange journey from Nazi spy to MI5 star. Working for the British, he created a bizarre fictional network of spies that misled the entire German High Command just before the allied invasion of Normandy. Historians are agreed that without Garbo, D-Day would almost certainly have failed - and our world would be a very different place indeed. Meticulously researched, yet told with the verve of a thriller, THE SPY WITH 29 NAMES uncovers the truth about the man behind one of recent history's most important and dramatic events.