I don't think it would be an exaggeration to say that this book changed my life. It's not something I say often.
McDougall knows how to tell a story. His experience writing feature articles for magazines has honed his chops for introducing and developing "characters", creating conflict, and keeping the pages turning while mixing backstory.
I was dubious of the whole minimalist running thing until I saw a few studies indicating some actual scientific merit. I picked up this book and I'm glad I did. I've changed to minimalist running (and no longer have any injuries) and it feels great.
But, don't get the wrong idea. I would recommend this book to non-runners and to those who have never heard of minimalist running. It is a great story. Many of the people in the book have become minor celebrities and much money has been raised to benefit the Tarahumara.