E-book

The World's Greatest Military Spies and Secret Service Agents: With the Introductory Chapter 'The Ethos of the Spy'

E-book

Spies and Secret Service - The Story of Espionage, Its Main Systems and Chief Exponents

E-book

Spies and Secret Service: The story of espionage, its main systems and chief exponents

E-book

Nurse and Spy in the Union Army: Comprising the Adventures and Experiences of a Woman in Hospitals, Camps, and Battle-Fields: With the Introductory Chapter 'The Ethos of the Spy'

E-book

Spies and Secret Service: The story of espionage, its main systems and chief exponents