I just have to plug this SF novel. It has about the worst possible book description on Amazon.com ("The adventures of an astronaut stranded on Mars"), so I would imagine that most folks will give it a pass. I'm here to tell you that this could be among the best
99 cents you'll ever spend.
I know that "hard" SF isn't everyone's cup of tea, and it's usually not mine either, but I found this e-book to be "un-put-downable." It's a credible story of human endurance and ingenuity in the face of insurmountable odds. The characters were compelling, and I found myself really rooting for the hero.
Two thumbs up (and I'm hard to impress. I seem to be one of the very few around here on MR who didn't love "Wool.")