What a great read. Not entirely sure about the science, but who cares when the manifest fortitude of one man, and the whole world's resources are aimed at saving a single life. If there was anything that the Red Planet did not throw at him in the way of disasters, Andy could not think of it. He tried writing every possible misfortune. I think that this is a good demonstration of perseverance and lateral thinking by the hero. I enjoyed the book a lot, and read it completely in three sittings.