I do believe I forgot to mention that I finished Born to Run: A Hidden Tribe, Superathletes, and the Greatest Race the World Has Never Seen.
It was a very interesting book about a white guy dubbed "Caballo Blanco", the white horse, who supposedly came from the US and started running around the Copper Canyon of Mexico with the native people there, Tarahumara Indians. This was the character that kept you interested in the book, wondering how he got this access to an unknown group of Indians in Mexico who were able to run for hours and days on end.
The plot shifts to the US and race directors for US ultramarathons and that brings in numerous more characters where they get Tarahumara Indians to come to the US and race the Leadville Ultramarathon.
Ultimately, this "Caballo Blanco" wants the best US ultramarathoners to go to the Copper Canyon and race the best of the Tarahumara tribe. By the end of the book that happens, Caballo Blanco gets his wish and in the final chapter you find out who this guy actually is; after forgetting about his character of who he really is in the previous few hundred pages.
It was a good story about distance running, racing and the human body, the science of nutrition, the mental capacity to keep going and little bits of scientific knowledge along the way.
