This is a tale of raw, basic survival in a rough terrain. One man, abandoned on Mars.
We read this for the library's book discussion, and many readers were surprised by how much they liked it. It's more about science than about science-fiction. There aren't ray guns and alien life forms; instead it's about one human surviving because he knows how to do advanced chemistry.
Mark Watney isn't about to give up, despite insurmountable odds. Not enough water? Chemistry! Not enough food? Botany! No communication? Rocks!
I have seen the Matt Damon movie, and it's very good. It's not quite the same, but honestly both stand up pretty well on their own (or even in comparison).
I highly recommend this one, even if you're not into advanced science and especially if you don't enjoy sci-fi. It's a captivating story, and you don't have to understand every formula to understand what a creative thinker the character (hell - the author!) is to persevere in these situations.