So, I loved this. Loved, loved, loved it. Loved it so much that I am rereading it.
On the surface, one might think that it is run-of-the-mill SciFi. But, it's so much more than that. This poor guy gets stranded on Mars and he makes the best of it. Truly. It's depressing and lonely and scary and colder than Chicago in March, but he really never lets himself get discouraged. Mark Watney is funny and profane and smarter than hell. He makes McGyver look like an idiot. I don't know if the science checks out, because I'm not that much of a nerd, but it feels very believable. And, he is exactly the sort of guy that I would want to be trapped in a bad situation with.
And, if Andy Weir ever comes to ORD, I will fawn all over him like a raving fangirl.