I read this recently.
It's the true story of (and authored by) a Navy SEAL who was the lone survivor of a catastrophic operation in Afghanistan. It was 2005 I think? They're badly outnumbered by the Taliban, the rest of his team is killed, and he's severely injured. He had to try to survive in the Afghan mountains while hoping to be rescued before the Taliban could find and kill him. The author also spends a good part of the book going into detail about the ridiculously difficult training required to become a SEAL.
It's an incredible story, and I'm amazed it hasn't been made into a movie yet. My only gripe with the book is the author frequently goes off on tangents about how everything is the liberal media's fault, or how Texans are better than everyone else. Other than that it was a really good read.