The Martian by Andy Weir

I'm stranded on Mars.

I have no way to communicate with Earth.

If the Oxygenator breaks down, I'l suffocate. If the Water Reclaimer breaks down, I'll die of thirst. If the Habitat breaches, I'll just kind of explode.

If non of those things happen, I'll eventually run out of food and starve to death.

Excellent used condition.