World War 2 Spy School The Complete 1943 SOE Counter-Espionage Manual
by Ian Hall
This document was the official training manual for every allied spy and counter-espionage agent in World War 2.
Written by the S.O.E. (M.I.6), it was soon picked up and used by the American OSS (the originator of the CIA).
In great detail, it describes such subjects as Explosives, Fieldcraft, Cyphers, and Propoganda. Care has been taken to deliver the manual in its original style and format.