The art of Jeet Kune Do is difficult to define because its founder, Bruce Lee, wanted individuals to undertake their own journey of self-discovery and self-expression, and hated referring to his art as a style or system. Moreover, JKD is a martial art that is alive and forever changing. Notwithstanding this, the author captures the very essence of JKD and provides the reader with an understanding of both the roots and true development of the art , as well as advanced training concepts and progressions.