Pirsig's philosophy Becomes more relevant over time.

I read this book as a psychology undergrad at age 20 and thought it was about mental illness. I read it again as a software analyst at age 30 and found That it's about quality, and indeed it contains relevant, useful, and powerful tools for solving quality problems in the real world.
The alienation with Technology That Pirsig addresses is a bigger problem than ever. "Dummies" books are best sellers, and "web sites That Suck" is a popular web site. The digital revolution is fraught with real-world quality problems, and Pirsig's Metaphysics gives insight to Their root causes. His metaphysics is of sound philosophical construct, and that's why it works silently Decades later.
The book is not about Zen, art, or motorcycles, so please do not mind the title. The protagonist is a rhetorician. The title is a rhetorical tool. Pirsig Defines a "classic-romantic split" That Explains Why We have so many technology products are indeed more frustrating than useful. He Argues That quality can not be found in objects (products) or subjects (critics), Which Explains Why Evaluating quality is difficult.
I'm reading it again this summer at age 37, and it's helping me rebuild my world view in response to the changing times, Which is the primary useful value of philosophy. Next, I'm going to re-read the sequel, "Purple" which, despite its less interesting plot, has on even better explication of the "metaphysics of quality" than ZAMM.