Anthony Summers is the award-winning author of eight bestselling non-fiction books. As a BBC journalist, he covered events in the United States and wars in Vietnam and the Middle East for Panorama. His most recent book The Eleventh Day, co-authored with Robbyn Swan, was a Finalist for the 2012 Pulitzer Prize for History. It also won the Crime Writer's Association's Gold Dagger award for best non-fiction - which the first edition of this book also won. Summers is the only author to have won two Gold Dagger awards for non-fiction.

Stephen Dorril is an acknowledged authority on the activities of the British security and intelligence services (MI5 & MI6). He is the author of an acclaimed history of MI6 and has been a consultant and researcher for many television and radio programmes on post-war covert operations. He lectures on investigative journalism at the University of Huddersfield.