Wow! What a massive and expansive book. How did he think up all this stuff? You can see why he won the Nebula Award in 1993. With all the controversy surrounding Mars exploration, this book is a must read. Green Mars, the second book in the trilogy, is on my short list of books to read, but after tackling Red Mars, I think I'll wait a while. Besides there are a limited number of *really* good sci-fi books. Sometimes I feel that I have to ration them.