​Dr. Michael Asken is the retired psychologist for the Pennsylvania State Police, specifically the Special Emergency Response Team. He was involved with the selection and training of troopers, as well as cadet performance issues at the Pennsylvania State Police Academy where he also taught. Asken holds a BA in social & behavioral sciences from Johns Hopkins University and a PhD in clinical psychology at West Virginia University. He was a Division of Sport and Exercise Psychology fellow at the American Psychological Association. Asken has written articles for Police1, SWAT Digest, The Crisis Negotiator, The Tactical Edge, Law Officer, The Bulletin of the Pennsylvania Chiefs of Police, and the FireArms Instructor.

A former army Ranger and paratrooper, Lt. Col. Dave Grossman taught psychology at West Point and was a Professor of Military Science at Arkansas State University. The author's website, Grossman On Truth, amplifies and extends the material covered in his books and is regularly updated with new, topical information on the subject.

Loren W. Christensen has published more than fifty books and dozens of magazine articles, and has been an editor for a police newspaper for nearly eight years. He has earned a first-degree black belt in arnis, a second-degree black belt in jujitsu, and an eighth-degree black belt in karate. In 2011, Christensen was inducted into the martial arts Masters Hall of Fame in Anaheim, California, receiving the Golden Life Achievement Award.
A former army Ranger and paratrooper, Lt. Col. Dave Grossman taught psychology at West Point and was a Professor of Military Science at Arkansas State University.

The author's website, Grossman On Truth, amplifies and extends the material covered in his books and is regularly updated with new, topical information on the subject.