I really liked the first one (Red Mars), I enjoyed the sequel (Green Mars) very much and while I craved for a continuation of the saga, I was somewhat disappointed by the finale. I liked the story that is told in Blue Mars but this time the amount of scientific descriptions and analysis put me off. I am not a scientist and especially I have no idea about physics and this book reached the point where I was simply annoyed! It took me a long time to read and that with skipping entire sciency paragraphs. So I have to deduct 2 stars for having too little story and too much science. So I guess if you want to read Red Mars go ahead, great book, the sequel is fine but this last one I would not read again.