The Martian / A. Weir

For a guy stuck alone on Mars, Mark Watney is shockingly optimistic.  As a mechanical engineer and a career botanist, his job is to grow stuff and fix things. 

This is essentially how he learns to survive after his team’s expedition went tragically wrong after only six days.  The Martian, by Andy Weir, is the story about how astronaut Mark Watney survives life on Mars.