The official introduction to San Budo Sogo Bugei, direct from its founder. In this groundbreaking work, Bret Gordon presents the first official guide to his modern martial art: a comprehensive system that blends traditional Japanese combat with practical, real-world application. Rooted in classical principles yet uncompromisingly relevant, San Budo is more than just a fighting style. It is a way of life, forged through discipline, ethics, and personal transformation. Drawing from decades of experience, Gordon reveals the origins and evolution of the system, the role of kata and weaponry, the importance of pressure testing, and the integration of internal power with moral clarity-all in service of creating a martial art that is both deadly and deeply human. "Demon Hand, Saint's Heart" is not just a martial arts manual. It is a manifesto for those who seek authenticity in their training, clarity in their purpose, and balance between strength and compassion. This is San Budo. This is where the journey begins.