I just finished this book. It follows Dean Karnazes on his journey to run 50 marathons in 50 states in 50 days. Not only did he do that (and while finishing his last marathon in 3 hours), he also decided to run 1,300 miles in a month back to start of his first marathon. This guy is a beast, if there ever was one.
He's also a proponent of midfoot strike running, minimalist footware (even recommended VFFs) and the "caveman" diet.