Robert Maynard Pirsig was an American writer and philosopher. He is the author of the philosophical novels Zen and the Art of Motorcycle Maintenance: An Inquiry into Values (1974) and Lila: An Inquiry into Morals (1991), and he co-authored On Quality: An Inquiry Into Excellence: Selected and Unpublished Writings (2022) along with his wife and editor, Wendy Pirsig.

Zen and the Art of Motorcycle Maintenance: An Inquiry into Values is a book by Robert M. Pirsig first published in 1974. It is a work of fictionalized autobiography and the first of Pirsig's texts in which he discusses his concept of Quality.