Sonny Umpad's Eskrima: The Life and Teachings of a Filipino Martial Arts Master
George M. Yore has studied martial arts for over forty years and holds instructor ranks in both Kenpo karate and Visayan Style Corto Kadena & Larga Mano Eskrima. He trained in the system of Visayan Eskrima under its founder, Maestro Santiago "Sonny" Umpad, and received official Guro status directly from him. An exercise physiologist by profession, Yore lives in Oakland, California.