I just finished reading Christopher McDougall's Born to Run: A hidden Tribe, Superathletes, and the Greatest Race the World Has Never Seen. It's about an indigenous tribe in the remote Copper Canyon in Mexico, the members of which like to run a lot. A crazy American dude has lived there for years and got some of the cooler American runners to go down there for a race. There's also discussion of the proper motivation for running (joy not money), proper form (landing on your forefoot like you would barefoot, not your heel) and evolution (we evolved running down game that can't sweat as well as we can). That sounds like lots of tangents, but they fit together well.
I liked it a lot more than I expected. I didn't really like an appearance by the author on a morning news show in which he seemed like a big tool pushing his pseudo-spiritual BS about barefoot running, but the dude totally knows how to spin a yarn. And he actually knows his stuff when it comes to ultras--both who are the best runners young and old, and who among those are the best all-around human beings.
Yes, there is some bad science in the book, but it only really bothered me in one chapter. He cites several studies showing that fancy motion-control/cushion/stability/whatever running shoes don't help prevent injury, the stupidest of which was a study that asked all the competitors in a big race about injury history and how much they spend on shoes, and what do you know, people with more expensive shoes got more injuries! (Right now I am rolling my eyes, swearing a lot, and feeling very misanthropic just thinking about this.) Of course they did. But did the spendy shoes cause the injuries? You don't know that. Perhaps people with previous injuries were more willing to spend money on shoes; this study doesn't tell you jack sh--. Anyway.
So aside from that, the book was way less BS than I expected. It was just a great adventure story about people running long distances and living an adventurous, non-corporate, non-consumerist lifestyle for the right reason--because they love it. I recommend it.