The legend of Billy the Kid has acquired iconic status in American folklore, yet the outlaw himself, also known as William Bonney, had minimal impact on historical events in New Mexico Territory of the late 1800s. More has been written about Billy the Kid than any other gunslinger in the history of the American West, while hundreds of books, motion pictures, radio and television programs and even a ballet have been inspired by his legend.
When he was still alive, "Billy the Kid" had already become a nationally-known figure whose exploits, real and imaginary, were reported in the National Police Gazette and the large newspapers of the eastern United States. After his death on July 14, 1881, all of New York City's papers ran his obituary, and within days, newspapers around the United States were printing exaggerated and romanticized accounts of Billy the Kid's short career. In the fifteen or so dime novels about his criminal career published between 1881 and 1906, the Kid was an outlaw antihero, customarily depicted as a badman with superior gunslinging skills, or even as a demonic agent of Satan who delighted in murder.
Within six weeks of Bonney's death there appeared the first complete narrative of his life, The True Life of Billy the Kid. Written by dime novelist John Woodruff Lewis under the pen name "Don Jenardo", this pulp novel depicted Billy the Kid as a sadistic psychopath.
Pat Garrett, smarting from local outrage over his shooting of the Kid, wanted to present his side of the story and hoped to turn a profit as well on the American public's fascination with the notorious outlaw. Consequently, he published his account of Bonney's life, The Authentic Life of Billy, the Kid, in 1882. It was credited to Garrett, but the first fifteen chapters were a concoction of factual material mixed with fabrications, written by Roswell's postmaster, Ash Upson, an itinerant journalist. The remaining chapters, written in a more restrained style, are generally accurate, and were likely composed by Garrett himself. The book failed to find a wide audience and sold just a few copies; nevertheless, although filled with many errors of fact, The Authentic Life served afterwards as the main source for most books written about the Kid until the 1960s. Thus was established the mythic stature of Pat Garrett as the heroic lawman in pursuit of the villainous but romantic desperado, Billy the Kid.