What drives a person to kill again and again?

In Psychology of Evil: Profiles of Serial Killers, psychologist and criminal-profiling specialist Florence McLean takes readers deep into the darkest corners of the human mind to examine how serial killers are formed, how they operate, and how they are ultimately hunted.

Drawing on decades of professional experience, advanced training in criminal profiling, and meticulous analysis of real cases from across the world, McLean reconstructs some of the most disturbing crimes in modern history. From infamous murder sprees to lesser-known cases, she shows how crime scenes, victimology, and offender behavior reveal patterns that are invisible to the untrained eye.

This is not sensational true crime. With clinical precision and moral clarity, McLean dismantles popular myths about profiling and exposes the complex psychological, social, and developmental factors behind serial violence. Most importantly, she argues that understanding is not about excusing evil—but about recognizing warning signs and exploring the possibility of prevention.

Gripping, unsettling, and profoundly insightful, this book is essential reading for anyone fascinated by criminal psychology, true crime, or the fragile boundary between humanity and monstrosity.