This is an amazing book that will change the way you think about running. It talks about a native American tribe named the Tarahumara that resides in a remote, mountainous region of northwestern Mexico. What is unique about this tribe is that their lifestyle revolves around running which has caused them to develop a seemingly, super-human ability to easily run dozens and even hundreds of miles. There are some fantastic stories involved which include some famous runners as well as some relatively unknown runners who were made famous by the book. The author also goes into detail about some compelling pseudo-science and startling facts about humans and running. A must read for anyone who considers themselves a runner.