This is the first book of its kind to employ hundreds of Chinese sources to explain the history and current state of Chinese Communist intelligence operations. It profiles the leaders, top spies, and important operations in the history of China's espionage organs, and links to an extensive online glossary of Chinese language intelligence and security terms. Peter Mattis and Matthew Brazil present an unprecedented look into the murky world of Chinese espionage both past and present, enabling a better understanding of how pervasive and important its influence is, both in China and abroad.