I liked the anecdotal writting style of the book but found myself skeptical about many of the things the author describes, for example the role humans have as natural born runners based on evolution theories, or about why Raramuris are great distance runners. I think this is a good book if you are looking for inspiration and even to question your own common beliefs about topics like running shoes, nutrition or training, but I think it would not be wise for the average Joe take this book as a guide and ditch his sneakers and survive on chia, pinole, and beer. It is good entertainment.