Pirsig's publishing house, William Morrow, announced that he died at his home in South Berwick, Maine. He had been in failing health.
"Zen and the Art of Motorcycle Maintenance" was published in 1974 and was based on a motorcycle trip Pirsig took in the late 1960s with his 12-year-old son, Chris.
Like a cult favorite from the 1950s, Jack Kerouac's "On the Road," the book's path to the best-seller list was long and unlikely. It began as an essay he wrote after he and Chris rode from Minnesota to the Dakotas and grew to a manuscript of hundreds of thousands of words.
Pirsig's novel was in part an ode to the motorcycle and how he saw the world so viscerally traveling on one, compared to the TV-like passivity of looking out at the window of a car.
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"Zen and the Art of Motorcycle Maintenance" ideally suited a generation's yearning for the open road, quest for knowledge and skepticism of modern values, while also telling a personal story about a father and son relationship and the author's struggles with schizophrenia.
"But some things are better than others, that is, they have more quality," he wrote. "But when you try to say what the quality is, apart from the things that have it, it all goes poof! There's nothing to talk about. But if you can't say what Quality is, how do you know what it is, or how do you know that it even exists? If no one knows what it is, then for all practical purposes it doesn't exist at all. But for all practical purposes it really does exist."
"Is 'Zen and the Art of Motorcycle Maintenance' a novel or an autobiography?" he wondered. "In this case the distinction seems of no importance; maybe it never was. Call the book, as Pirsig himself does, an inquiry. Therein lies its singular energy and force."
He studied philosophy at the University of Minnesota, traveled to India and back in the states honed an enigmatic teaching style at Montana State College and at the University of Illinois, sometimes refusing to grade papers or asking students to grade each other.
"I could not sleep and I could not stay awake," he told The Guardian. "I just sat there cross-legged in the room for three days."
Pirsig is survived by his wife, Wendy; son, Ted; daughter, Nell Peiken, and son-in-law, Matthew Peiken, along with three grandchildren.