"Fear and Loathing in Las Vegas: A Savage Journey to the Heart of the American Dream" by Hunter S. Thompson
Hunter Thompson practiced total immersion journalism. This form of reporting is called gonzo journalism.
Hunter Thompson drove to Las Vegas to report on a motorcycle race and ended up writing a story about himself writing a story about a motorcycle race. If he would have written a conventional report on motorcycle racing it would have been interesting to motorcycle enthusiasts for a few days. Since he wrote a gonzo story he had a very wide canvas and he used it well to create a classic.