Dan provides a first hand account of his struggles through personal insecurity, war zones, drug addictions, therapy, religion, and self help, ultimately settling on the meditation and philosophy (but not mysticism) of Buddhism. I had a lot of trouble putting the book down.
With other books on meditation or enlightenment, I have always been left with the questions: "Yes, but what does the path of improvement feel like? How much better do things get? What should I expect?". Dan provides his experience over the first four years of this path, all the while trying to offset his "zen" with a demanding and competitive career, in an honest and enlightening manner.
I'd probably recommend this book first for introducing "regular" people to meditation.