On Killing: The Psychological Cost of Learning to Kill in War and Society Paperback – Illustrated, June 22, 2009

On Killing: The Psychological Cost of Learning to Kill in War and Society

On Combat: The Psychology and Physiology of Deadly Conflict in War and in Peace

On Spiritual Combat: 30 Missions for Victorious Warfare (Faux Leather) – A Spiritual Warfare Guide for Military Members, Law Enforcement Officers, First Responders, and all Sheepdogs