Andrew Cook worked for many years as a foreign affairs and defense specialist, and the contacts he made enabled him to navigate and gain access to classified intelligence services archives. He is only the fifth historian to be given special permission under the 1992 “Waldegrave Initiative” by the Cabinet Office to examine closed MI6 documents that will never be released. He is author of critically acclaimed Ace of Spies: The True Story of Sidney Reilly, To Kill Rasputin and Prince Eddy, all published by Tempus. He is a regular contributoron espionage history to The Guardian, The Times and History Today.