John Little is considered to be one of the world's foremost authorities on Bruce Lee. He's the only person who has ever been authorized to review the entirety of Lee's personal notes, sketches and reading annotations, giving him an insider's look at Lee's training methods and philosophies. He's shared this information with Lee's fans in his books published by Tuttle Publishing, including: Bruce Lee: Artist of Life; Jeet Kune Do: Bruce Lee's Commentaries on the Martial Way; Letters of the Dragon; The Tao of Gung Fu: A Study in the Way of Chinese Martial Art; Striking Thoughts: Bruce Lee's Wisdom for Daily Living and Bruce Lee: The Celebrated Life of the Golden Dragon.
-His teachings (some of which were captured in his book The Art of Expressing the Human Body) served as the basis for many subsequent popular training and fitness programs such as Tae Bo and P90X.- --Bruce Y. Lee, Forbes