Week after week, the hit TV show Criminal Minds gives viewers a look inside the psyches of the fictional serial killers tracked by the BAU (Behavioral Analysis Unit). This elite team of FBI agents travels the country assisting law enforcement officials by examining the crime scene, "profiling" the perpetrator, and aiding in arrest and interrogation. In this book Katherine Ramsland reveals how reality differs from fiction and how forensic psychologists actually use their knowledge of human behavior and motivations as consultants in criminal investigations-as well as detailing the real cases that influenced some of Criminal Minds's most memorable episodes.