Mishka Shubaly's short ebook, Shipwrecked, is hilarious, insightful, a little worrisome, and filled with empathy.
Shubaly is in a state of despair. His best friend died of a heroin overdose, while he was indulging in drinking too much. Blaming himself in a rather difficult situation, he decides to deal with the situation by drinking more and serving as a low-level member of a sailing trip. He messes up (He's not the strongest member of the crew.), almost dies (It's the 'Year of the Shark,'), continues to inebriate himself - but ultimately redeems himself.
After the boat runs aground, Mishka convinces the captain (whose responsibility it should be) that he should go for help. He argues he's younger, stronger, doesn't have Parkinson's (the captain does) or a family, but most memorable - that he's expendable.
Realizing that you're expendable is a mature thing to realize. Most people think they're so important, that they're going to live forever, that their invincible. They deny their very mortality, the very fact that they don't impact the universe very much, the very fact that they're just not that important. This is a huge turning point for Mishka.
Survival is what comes next...one might argue, "It's merely a day," and as I'm currently reading Endurance about Shackleton's journey across Antarctica, and that is months, our world, our society is all about the now, the instant. For example, not having my phone on me for mere hours - chaos. We need everything now. So I think this is HUGE.
Great changes happen, but he ultimately remains the same - because you are always the same inside.