This was another of my alternates for the Unread Authors challenge - I have a bad habit of reading the alternates first - ha ha.
I enjoyed this - it reminds me a lot of Michael Chrichton, both because of the nanobot plotline, and in the general style. This had a lot less science, though. The characters were interesting, if a little flat in some parts. I would have liked a better picture of how devastated the world was, and what the survivors still faced. It was a quick read, though - perfect for the end of summer.
I finally started reading "The Guardians", so that will be next.