Secret Services

Oxford University Press, USA

Venice's Secret Service: Organizing Intelligence in the Renaissance

On Her Majesty's Secret Service                  

Kingsman: The Secret Service                    

Wistana GmbH

Secret Services: A Hidden Misfire (Deciphered History) (English Edition)

Guarding Tess                                    

Amacom

Secret Service: Hidden Systems That Deliver Unforgettable Customer Service

Secret Service: Military Secret Service,Romanian mercenaries, Romanian Mafia (English Edition)

Service Secret: Inspirée d’une vie réelle. Mafia (French Edition)

Wistana GmbH

Serviços Secretos: Um erro oculto (História decifrada) (Portuguese Edition)

Italian secret service