"As a researcher of serial murder, I am all too familiar that many hyped publications and other media offer no citations of source material for their information and claims about those who commit these heinous crimes. In the book Killer Data: Modern Perspectives on Serial Murder, prolific researcher and gifted author Enzo Yaksic brings us on a fascinating empirical exploration of this phenomenon. While acknowledging that we are just beginning to understand some of the factors that motivate predatorial perpetrators of serial homicide, Yaksic takes us on a scientifically informed journey through killer facts and theories. He introduces us to the scientific study of serial homicide, reviews and compares historical and contemporary research, and provides new, fascinating data about modern incarnations of these murderers. This book is a must-have foundational guide for any researcher or student of serial homicide, and it will appeal to members of the public interested in these criminals and crimes that fascinate us and fuel our nightmares."

―Dr. Marissa A. Harrison, Penn State Harrisburg, Research Psychologist and Author of Just as Deadly: The Psychology of Female Serial Killers (forthcoming, Cambridge University Press)

"Killer Data provides a contemporary exploration and insight into serial murder. A must-read contribution to the field!"

―Dr. Clare Allely, University of Salford, England, Reader in Forensic Psychology and author of The Psychology of Extreme Violence: A Case Study Approach to Serial Homicide, Mass Shooting, School Shooting and Lone-actor Terrorism

"Enzo Yaksic has been immersed in serial murder research for nearly two decades, amassing information about deviants and psychopaths to better understand them. The culmination of that effort is Killer Data, a definitive state-of-the-union report on serial killers in the 21st century. Through his research and insights into the continually changing and evolving phenomenon of serial homicide, Yaksic ushers students, scholars, police officials, and the news media into a new unprecedented understanding of serial killers today and potentially in the near future."

―Peter Vronksy, Ryerson University, lecturer and author of Sons of Cain: A History of Serial Killers From the Stone Age to the Present (2018), and American Serial Killers: The Epidemic Years 1950-2000

Enzo Yaksic has studied serial murder for 20 years and is the director of the Atypical Homicide Research Group (AHRG), a think tank that strives to understand the modern-day multiple homicide offender through the systematic collection and analysis of data. The AHRG organized and maintains the Consolidated Serial Homicide Offender Database, the largest open repository for information on atypical homicide offenders. As the author of 15 manuscripts on serial homicide, Enzo is at the forefront of serial murder research. Enzo’s current work with the Murder Accountability Project aims to educate Americans on the importance of accurately accounting for unresolved homicides within the USA by using the Supplementary Homicide Report to help uncover suspicious clusters of potential serial homicide activity. Enzo has been quoted in the Los Angeles Times, The Washington Post, The New Yorker, and USA Today. Enzo was profiled in a Boston Magazine article titled Profiler 2.0.