"Will to Live" by Les Stroud, perhaps better known as "Survivorman" on the Discovery Channel. Les recounts several instances of people stuck in survival situations, including himself, and comments on what they did or could have done better during their ordeal. These include the Andes plane crash survivors who had to resort to cannibalism to survive; Chris McCandless, who sought to live on his own in the Alaskan wilderness; the Robertson family who were adrift at sea for 38 days; and others.
The main takeaways from the book are the importance of recognizing when you're in a survival situation, constantly working proactively to better one's situation in those circumstances, and above all maintaining a determination to survive. A pretty gripping read that does what it says on the jacket, but seems slightly incomplete, as though it needs to be supplemented with some more complete straightforward survival advice.