Tao of Jeet Kune Do is a book expressing Bruce Lee's martial arts philosophy and viewpoints, published posthumously (after Bruce Lee's death in 1973). The project for this book began in 1970 when Bruce Lee suffered a back injury during one of his practice sessions. During this time he could not train in martial arts. He was ordered by his doctors to wear a back brace for 6 months in order to recover from his injury. This was a very tiring and dispiriting time for Lee who was always very physically active.

It was during his convalescence that he decided to compile a treatise on the system or approach to martial arts that he was developing; he called it Jeet Kune Do. The bulk of these writings would become the "core set of writings". Many of these writings were done during a single session which provided natural continuity. Lee had also kept various notes throughout the development of his combat philosophy and these would become the disparate notes used in the book. Many of these notes were "sudden inspirations" which were incomplete and lacked any kind of a construct. The combination of the "core set of writings" and the "disparate notes" would be known as the text Tao of Jeet Kune Do.

Jeet Kune Do (截拳道; also "Jeet Kun Do", "JKD," or "Jeet Kuen Do") is a hybrid martial arts system and life philosophy founded by martial artist Bruce Lee with direct, non classical and straightforward movements. Due to the way his style works they believe in minimal movement with maximum effect and extreme speed. The system works on the use of different 'tools' for different situations. These situations are broken down into ranges (Kicking, Punching, Trapping and Grappling), with techniques flowing smoothly between them. It is referred to as a "style without style" or "the art of fighting without fighting" as said by Bruce Lee himself. Unlike more traditional martial arts, Jeet Kune Do is not fixed or patterned, and is a philosophy with guiding thoughts. It was named for the concept of interception, or attacking your opponent while he is about to attack. However, the name Jeet Kune Do was often said by Bruce Lee to be just a name. He himself often referred to it as "The art of expressing the human body" in his writings and in interviews. Through his studies Bruce came to believe that styles had become too rigid, and unrealistic. He called martial art competitions of the day "Dry land swimming". He believed that combat was spontaneous, and that a martial artist cannot predict it, only react to it, and that a good martial artist should "Be like water" and move fluidly without hesitation.

Bruce Lee (born Lee Jun-fan; 27 November 1940 – 20 July 1973) was a Chinese AmericanHong Kong actor,martial arts instructor, philosopher, film director, film producer, screenwriter, and founder of the Jeet Kune Do martial arts movement. He is widely considered by many commentators, critics, media and other martial artists to be the most influential martial artist and pop culture icon of the 20th Century. He is often credited with changing the way Asians were presented in American films.

Lee was born in San Francisco to parents of Hong Kong heritage but was raised in Hong Kong until his late teens. Lee returned to the United States at the age of 18 to claim his U.S. citizenship and receive his higher education. It was during this time that he began teaching martial arts, which soon led to film and television roles.

His Hong Kong and Hollywood-produced films elevated the traditional Hong Kong martial arts film to a new level of popularity and acclaim, and sparked a major surge of interest in Chinese martial arts in the West in the 1970s. The direction and tone of his films changed and influenced martial arts and martial arts films in Hong Kong and the rest of the world, as well. He is noted for his roles in five feature-length films: Lo Wei's The Big Boss (1971) and Fist of Fury (1972); Way of the Dragon (1972), directed and written by Lee; Warner Brothers' Enter the Dragon (1973) and The Game of Death (1978), both directed by Robert Clouse.