I read this book some years ago, and re-read it this year. These days genre mashups are popular, but this was one of the first books to cross a hard-boiled detective with a science fiction world, and it works really, really well. The writing is good, the world-building is terrific, and there is plenty of action to propel the plot. If I had any complaints it would be that there's a few too many subplots, and things can get a little muddled, especially toward the end.