THE OPERATORS On the Streets with Britain's Most Secret Service James Rennie Pen & Sword Yorkshire, 2004     DEFENDING THE REALM Inside MI5 and the War on Terrorism Mark Hollingsworth y Nick Fielding André Deutsch London, 1999

THE FIFTH MAN Reveals for the first time the identity of Britain’s most notorious spy Roland Perry Pan Books London, 1994     HISTORICAL DICTIONARY OF BRITISH INTELLIGENCE Nigel West The Scarecrow Press Oxford, 2005

THE QUEST FOR C Sir Mansfield Cumming and the founding of the Secret Service Alan Judd HarperCollins Publishers London, 1999     A MATTER OF TRUST MI5 1945-72 Nigel West Weindenfeld & Nicolson London, 1982

MIS CAMARADAS DE CAMBRIDGE La vida y la muerte de los espías ingleses que decidieron trabajar para Moscú, narradas por su contacto del KGB Yuri Modin Planeta Barcelona, 1995     THE SIXTEEN The Covert Assassination Squad that Went Beyond the SAS John Urwin Vision London, 2003

MI6 LA GRAN TRANSGRESION De Alto Secreto a máxima seguridad Richard Tomlinson Península/Atalaya Barcelona, 2000     CAZADOR DE ESPÍAS Confesión autobiográfica de un jefe del servicio de inteligencia Peter Wright y Paul Greengrass Ediciones B Madrid, 1987

UK EYES ALPHA The Inside Store of British Intelligence Mark Urban Faber and Faber London, 1996     MI6 Inside the Covert World of Her Majesty's Secret Intelligence Service Stephen Dorril The Free Press New York, 2000

INSIDE BRITAIN’S MI6 Military Intelligence 6 Shaun McCormack The Rosen Publishing Group New York, 2003