This book read more like a memoir to me. It could also be a motivational book for some. He gives lots of advice on running and stories about his running experience, what's worked for him and what's not. This is advice coming from a normal guy who has tried lots of things and found what works for him and it may or may not work for you. This book is a lot like reading a journal from a runner.
He also compares different addictions and the types of addictions. He used to be an alcoholic so there are some times that he compares that addiction to the addiction of running. I did love some of the comparisons and the final section about good addictions.
The narrator did a good job as well. He would raise his voice and whisper when it called for it and it almost felt like the author was reading the book.