Why am I passionate about this?

I'm a research psychologist. My expertise is in evolutionary psychology, which is a lens through which all mental processes and behavior can be framed. I've studied a wide variety of topics, ranging from love to murder. I do believe that we evolved morbid curiosity as a mechanism of protective vigilance. People have a great interest in consuming material about the who, what, why, how, where, and when of these terrible crimes. In Just as Deadly, I provide fact-based information derived from my own empirical research in addition to about 1200 other sources. It was important to me to pursue and write about truths. In addition, I don’t—and won’t—engage in drama or gore.


I wrote

Just as Deadly: The Psychology of Female Serial Killers

By Marissa A. Harrison,

Book cover of Just as Deadly: The Psychology of Female Serial Killers

What is my book about?

You've heard of Ted Bundy and John Wayne Gacy. But have you heard of Amy Archer-Gilligan? Or Belle Gunness? Or…

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The books I picked & why

Book cover of When She Was Bad

Marissa A. Harrison Why did I love this book?

Award-winning author Patricia Pearson has a no-nonsense knack for finding and reporting truths, no matter how unsettling these are. Pearson doesn’t hesitate to express her own viewpoints but does so from the wealth of evidence she carefully collects. And she doesn’t care if this flies the face of “popular” opinion! I appreciate that she avoids sensationalism. She is dedicated and bright. I respect her enormously. She’s also been a kind and supportive colleague! When talking about Pearson’s work in my book, I noted it interesting that many efforts underscoring that women can do just as horrible things as men can have largely come from women, like Patricia, myself, Debra Schurman-Kauflin (mentioned below), and sociobiologist Amanda Farrell from Old Dominion University. 

By Patricia Pearson,

Why should I read it?

1 author picked When She Was Bad as one of their favorite books, and they share why you should read it.

What is this book about?

In this provocative book, award-winning journalist Patricia Pearson argues that our culture is in denial of women's innate capacity for aggression. We don't believe that women batter their husbands or abuse the majority of children in North America. We ignore the 200 percent increase in crime by women in a period when most crime statistics are dropping. Pearson weaves the stories of women such as Karla Homolka and Mary Beth Tinning (who smothered eight of her children) with the results of criminologists and psychiatrists to expose the myth of female innocence.


Book cover of The New Predator: Women Who Kill: Profiles of Female Serial Killers

Marissa A. Harrison Why did I love this book?

Schurman-Kauflin is not an armchair quarterback. She is the real deal. Schurman-Kauflin carefully gathered the facts she presents in this book. A skilled criminal profiler, she interviewed female serial killers (FSKs) herself, and she presented some of the clearest evidence I have ever encountered on FSKs’ backgrounds, crimes, and motives. Her work, although published a while ago, has withstood the test of time, as her findings have been replicated. In my own career, I have used her work as a source many times over.

By Deborah Schurman-Kauflin,

Why should I read it?

1 author picked The New Predator as one of their favorite books, and they share why you should read it.

What is this book about?

Book by Schurman-Kauflin, Deborah


Book cover of Serial Murderers and Their Victims

Marissa A. Harrison Why did I love this book?

Erik Hickey is the pioneer in serial killer research. His renowned book is the gold standard for those wishing to gather the facts about serial murderers, their crimes, and their victims. He does not include “gore” (his word) in his writings. His work is methodical, evidence-based, and respectful, and his results have been consistently replicated by my team and others. With respect to my recommendation theme, in this book, Hickey describes his lengthy research on both male and female serial killers and emphasizes that the crimes of male serial killers (MSKs) are starkly different than those of FSKs. I know him to be a great supporter of other researchers in their empirical pursuits. His book is a must-have for scholars and students of psychology and criminal justice interested in this topic.

By Eric W. Hickey,

Why should I read it?

1 author picked Serial Murderers and Their Victims as one of their favorite books, and they share why you should read it.

What is this book about?

This book provides an in-depth, scholarly examination of serial murderers and their victims. Supported by extensive data and research, the book profiles some of the most prominent murderers of our time, addressing the highest-profile serial killer type--the sexual predator--as well as a wide variety of other types (male, female, team, healthcare, and serial killers from outside the U.S.). Author Eric Hickey examines the lives of over 400 serial murderers, analyzing the cultural, historical, and religious factors that influence our myths and stereotypes of these individuals. He describes the biological, psychological, and sociological reasons for serial murder and discusses profiling and…


Book cover of Killer Data: Modern Perspectives on Serial Murder

Marissa A. Harrison Why did I love this book?

Enzo Yaksic has been my colleague and friend for years. However, I am not recommending his book because of this. Rather, my certainty of his research acumen, integrity, and dedication is why I am grateful I know him. I always jump at the chance to work with him and to read his latest findings. As co-founder and Director of the Atypical Homicide Research Group, he is known as a go-to expert for serial murder facts. This book does not feature drama or sensationalism. Yaksic wrote this book as a no-nonsense presentation of serial homicide offender patterns. This is not light or casual reading—it’s a professional, hardcore, research exploration of the frightening world of serial murderers. As always, Yaksic pays keen attention to detail and presents his work eloquently.

By Enzo Yaksic,

Why should I read it?

1 author picked Killer Data as one of their favorite books, and they share why you should read it.

What is this book about?

utilizes the Consolidated Serial Homicide Offender Database, one of the largest and most robust open access databases of multiple murders available illustrated with in-depth case studies of SHOs, such as Felix Vail, Michael Sumpter, the Seminole Heights Killer, and the Austin Bomber provides commentary from those who have used these patterning methods in practice, in addition to laying out how to put the current suite of data tools to use within organizations


Book cover of Understanding Sexual Serial Killing

Marissa A. Harrison Why did I love this book?

Frederick Toates has been studying and writing about serial murder for many years. As a biological psychologist, he has authored many works about arousal and motivation. In this book, he and Olga Coschug-Toates, a fellow clinical scholar and noted author, present a biopsychosocial perspective of sexually motivated serial murders. They also highlight important concepts through case studies, making the presentation interesting and applicable. Although my recommended list revolves around elucidating the motives and means of FSKs, understanding how male serial killers commonly operate illustrates the stark differences between FSKs and MSKs.

By Frederick Toates, Olga Coschug-Toates,

Why should I read it?

1 author picked Understanding Sexual Serial Killing as one of their favorite books, and they share why you should read it.

What is this book about?

Why do some people engage in serial killing for sexual pleasure? This book considers the phenomenon of sexual serial killing from the perspective of motivation theory, as advanced in psychology and neuroscience. By examining biological, psychological and social determinants, it develops a model of sexual killing that integrates widely dispersed existing literature. The first part of the book reviews scientific data and theories, while the second part presents biographical sketches of 80 sexual killers and links their early development and later killing to current theoretical understanding. The book examines cases of serial killers from the USA, Western Europe, Iran, Australia…


Explore my book 😀

Just as Deadly: The Psychology of Female Serial Killers

By Marissa A. Harrison,

Book cover of Just as Deadly: The Psychology of Female Serial Killers

What is my book about?

You've heard of Ted Bundy and John Wayne Gacy. But have you heard of Amy Archer-Gilligan? Or Belle Gunness? Or Nannie Doss? Women have committed some of the most disturbing serial killings ever seen in the United States. Yet scientific inquiry, criminal profiling, and public interest have focused more on their better-known male counterparts. As a result, female serial killers have been misunderstood, overlooked, and underestimated.

In this riveting account, Dr. Marissa A. Harrison draws on original scientific research, various psychological perspectives, and richly detailed case studies to illuminate the stark differences between female and male serial killers' backgrounds, motives, and crimes. She also emphasizes the countless victims of this grisly phenomenon to capture the complexity and tragedy of serial murder. - written by Cambridge University Press

Book cover of When She Was Bad
Book cover of The New Predator: Women Who Kill: Profiles of Female Serial Killers
Book cover of Serial Murderers and Their Victims

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Book cover of Uniting the States of America: A Self-Care Plan for a Wounded Nation

Lyle Greenfield Author Of Uniting the States of America: A Self-Care Plan for a Wounded Nation

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