Kris Wilder began his martial arts training in 1976 in the art of Tae Kwon Do, he has earned black belt-level ranks in three arts: Tae Kwon Do (2nd Degree), Kodokan Judo (1st Degree) and Goju-Ryu Karate (5th Degree), which he teaches at the West Seattle Karate Academy.

Though now retired from Judo competition, while active in the sport Kris competed on the national and international level. He has traveled to Japan and Okinawa to train in karate and has authored several books on the martial arts, including co-authoring The Way of Kata. He has also written guest chapters for other martial arts authors and has had articles published in Traditional Karate, a magazine out of the U.K. with international readership. Kris also hosts the annual Martial University, a seminar composed of multidisciplinary martial artists, and he regularly instructs at seminars.

Kris lives in Seattle, Washington with his son Jackson.

Lawrence is the best-selling author of nine books.

A founding technical consultant to University of New Mexico's Institute of Traditional Martial Arts, he also has written numerous articles on martial arts, self-defense, and related topics for prestigious publications such as the International Ryukyu Karate-jutsu Research Society Journal, Jissen, Fighting Arts, and Traditional Karate magazine.

Since 1970, Lawrence has studied and taught traditional Asian martial arts, medieval European combat, and modern close-quarter weapon techniques. During the 26 years he worked stadium security part-time he was involved in hundreds of violent altercations, but got paid to watch football. He is currently a senior strategist at an aerospace company where he gets to play with billions of dollars of other people's money and make really important decisions. He lives in Seattle, Washington with his son Joey and wife Julie.