A very challenging book to read, but one that I enjoyed as I committed myself to reading to from start to finish. Yet again, Stephenson's wild mind created another concept story that blew my mind. An intellectual read for sure. It took me some time to get used to the language the author created for the story. Kept having to refer to the glossary - like Composto's The End of the Kai. But after 100 pages or so I got used to it. Any fan of hard core sci fi will enjoy it.