Loren W ChristensenLoren W. Christensen is a martial arts expert who served in Vietnam and spent nearly three decades in law enforcement. A professional writer since 1978, he has authored or coauthored nearly sixty books, including Warrior Mindset, Timing in the Fightig Arts, and The Mental Edge, as well as dozens of magazine articles. He has written on subjects, including martial arts, street gangs, school shootings, and workplace violence, and edited a police newspaper for seven years. Read More Read Less