This succinct no-nonsense primer on the business of espionage looks at the history of human intelligence gathering, known as HUMINT, from the Revolutionary War to the present. Extremely well-written, it is equally valuable for training case officers and intelligence analysts and for fans of espionage novels and movies who want to know what it's really like. Case studies profile some of the most important figures in espionage history who have impacted world events, including Arnold Deutsch, the famous spy who recruited the Cambridge network of spies for Soviet intelligence. Topics covered include methods of collecting intelligence, recruiting, "tradecraft" or operational methods, the future of spying, and personality traits and education needed for a successful case officer. A "must" read" for anyone considering a career in intelligence and an invaluable textbook for courses on national security.