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Without moving a knife or a needle, the subtle inner world of the criminal is revealed layer by layer! "The Butcher of Rostov" - Andrei Chikatilo "Milwaukee Cannibal" - Jeffrey Dahmer "Düsseldorf Vampire" - Peter Kurten "The Boston Strangler" - Albert DeSalvo "College Killer" - Edmund Kemper "Railway Rapist" - John Duffy "Yorkshire Ripper" - Peter Sutcliffe Author Dr. Brian Inner examines the major cases of the twentieth century in an engaging and authoritative way. Criminal cases continue to appear in the book, from the "Jack the Ripper" and "Yorkshire Ripper" in the UK, to the "Düsseldorf Vampire" in Germany, to the "College Bomber" who shocked society in the United States. Several well-received thriller crime movies are interspersed in it. The reasons why individual cases commit crimes are systematically stated and analyzed, as well as the criminal psychology theories used by practitioners and psychological investigation scholars when tracking these cases. Through Brian Yin's rich knowledge and fluent writing style, readers can enter the field of criminal psychology, compare these theories with individual cases, and conduct case analysis and research.