The text describes Bruce Lee's Kung Fu fighting techniques, philosophy and training methods. This book was originally written in 1966 by Bruce Lee. However, Lee decided not to publish this work as he feared that instructors would use the fighting knowledge in this text to promote themselves.
Bruce Lee wrote a book detailing his Kung Fu fighting techniques, philosophy, and training methods in 1966. However, he ultimately chose not to release it because he feared that martial arts instructors would misuse the information for personal gain.