Pirsig is the author of the book "Zen and the Art of Motorcycle Maintenance" ...

Back in my university days (at about the time this book first became widely read), I knew a Zen Buddhist who was addicted to Codeine cough medicine.
It was felt that he should one day write a book called "Zen and the Art of Habit Maintenance" ... but, alas, that never happened (AFAIK).

Cheers,
Rob