With its lurid vice, savage violence and conspiratorial atmosphere, no place on earth in the 1930s and 1940s better exemplified the twilight zone between politics and criminality than China's largest, most cosmopolitan and most dangerous city. Shanghai before the Second World War was an extraordinary place. Civil war raged among Chinese political factions and criminal gangs. Intelligence organizations, police forces and para-military units of many nationalities vied with one another, sold secrets and engaged in a brutal struggle for supremacy in the Far East. In Shanghai espionage, subversion, propaganda and crime came together in a lethal concoction. After Japan invaded China in 1937, the secret war intensified. Bernard Wasserstein has uncovered startling new evidence from intelligence archives in half a dozen countries. He shows how Allied and Axis agents battled one another in this oriental cockpit. He also reveals the extent of collaboration with the Japanese by British, American and Australian nationals. This book untangles a remarkable history of complicity, duplicity and betrayal -- as well as occasional heroism.