The Industrial Espionage Handbook by Hugo Cornwall
A book which details methods of risk reduction, prevention and counter-espionage. Advice is offered on how to spy, how others could be spying on you, and the resources, disciplines, techniques and technologies available to the industrial espionage agent. Most of the activities described in this book are not illegal and the author explains how the law works and documents previous cases. The author's previous books include The Hacker's Handbook.