Loren Christensen

A recognized expert on martial arts, self-defense, street gangs, and police survival. He retired from the Portland, Oregon Police Bureau in 1997 after 29 years of law enforcement, including three years in the U.S. Army Military Police, during which he also served in Vietnam. He has testified in courts as an expert on police use of force. Since retiring, he has devoted his time to martial arts training and his writing career. He is currently the author of about 70 published books, including not only specialized literature on martial arts, police methods, PTSD, mental preparation for violence, exercise, military subculture, etc., but also works of fiction, three of which have become bestsellers.