Andrew Cook is an author and TV consultant. He has written for The Times, Guardian, Independent, BBC History Magazine and History Today. His previous books include On His Majesty's Secret Service (Tempus, 2002), Ace of Spies (Tempus, 2003), M: MI5's First Spymaster (Tempus, 2006), The Great Train Robbery (THP, 2013) and 1963: That Was the Year That Was (THP, 2013).