Robert J Girod 
Advanced Criminal Investigations and Intelligence Operations [PDF ebook] 
Tradecraft Methods, Practices, Tactics, and Techniques

Tradecraft is a term used within the intelligence community to describe the methods, practices, and techniques used in espionage and clandestine investigations. Whether the practitioner is a covert agent for the government or an identity thief and con man, the methods, practices, tactics, and techniques are often the same and sometimes learned from