The Seventies bestseller Zen and the Art of Motorcycle Maintenance was the biggest-selling philosophy book ever. But for the reclusive author life was bitter-sweet. Here, he talks frankly about anxiety, depression, the death of his son and the road trip that inspired a classic. At 78, Robert Pirsig, probably the most widely read philosopher alive, can look back on many ideas of himself. There is the nine-year-old-boy with the off-the-scale IQ of 170, trying to work out how to connect with his classmates in Minnesota. There is the young GI in Korea picking up a curiosity for Buddhism while helping the locals with their English. There is the radical, manic teacher in Montana making his freshmen sweat over a definition of ‘quality’. There is the homicidal husband sectioned into a course of electric-shock treatment designed to remove all traces of his past. There is the broken-down father trying to bond with his son on a road trip. There is the best-selling author of Zen and the Art of Motorcycle Maintenance, offering solutions to the anxieties of a generation. And there is, for a good many years, the reclusive yachtsman, trying to steer a course away from cultish fame.