This book explains the criminological foundations of industrial espionage, clarifies the phenomenon, and provides a comprehensive action plan for prevention through the RADAR approach. Often, it is primarily insider threats that play a crucial role in espionage. For security professionals, distinguishing between industrial espionage and economic or competitive intelligence gathering is not always straightforward, both legally and practically. The author offers a scientific-theoretical explanation of the phenomenology and criminological background, as well as practical assistance to implement an effective and comprehensive information protection concept.