Fraud fascinates, entertains, frustrates, and polarizes. Rightly so, as the author demonstrates, because a successful fraud is, from a purely technical perspective, a true masterpiece, yet morally it is a trust-shattering manipulation. In this book, the phenomenon is not only explained for the first time with (social) scientific grounding but also presented in an easily understandable way. What are the tricks of fraudsters? What hidden mechanisms do they exploit? How do people and society play into their hands? In this book, Sonja Veelen reveals how fraud works and how fraudsters can deceive their fellow human beings. An interview conducted by the author with the fraudster Gert Postel, who served as the chief physician of psychiatry for one and a half years as a postman without any medical qualifications, complements the discussion.