Title: The Ninja and Their Secret Fighting Art, Author: Stephen K. Hayes
Title: Ninja Fighting Techniques: A Modern Master's Approach to Self-Defense and Avoiding Conflict, Author: Stephen K. Hayes
Title: The Ninja Defense: A Modern Master's Approach to Universal Dangers [DVD Included], Author: Stephen K. Hayes
Title: The Complete Ninja Collection, Author: Stephen K Hayes
Title: Defensive Tactics for Today's Law Enforcement, Author: Stephen K. Hayes