This is a slightly premature recommendation as I'm only about a 1/3 through but... it's only going to be avail till 4/30/13 as the author sold out to a major publisher (and I'm sure movie rights ect.)
Anyway, nearish future sci-fi about our 3rd manned trip to Mars. No aliens or none of that stuff, but basically guy got left for dead during an emergency evac and got left behind. Love the guys writing style, very entertaining and very detailed in what the guy is doing to try and save/feed himself.
Can't go wrong only 99 cents till Tue.
http://www.amazon.com/The-Martian-ebook ... 634&sr=8-1