From our obsession with serial killers to violence in pop culture, we seem inescapably drawn to the stories of monstrous acts and the people who commit them. But evil, Julia Shaw argues, is all relative; what one culture may consider normal, like sex before marriage, eating meat, or being a banker, others find abhorrent. And if evil is only in the eye of the beholder, can it be said to exist at all? In this freethinking inquiry, Shaw uses case studies from academia, examples from and popular culture, and anecdotes from everyday life to shed new light on such concepts as the neuroscience of evil, workplace misbehavior, and the psychology of bloodlust.