This was a fun read. It brought me back to my older hard sci-fi days. I'd missed those.

In classic Stephenson style it's clearly a long read. I enjoyed the discussion of orbital mechanics and this book has made me want to play around with learning that.

Epigenetics sounds awesome and I'd be interested to find out if that was real. A Google search is in my future.

Anyway, I can recommend this to anyone who enjoys hard sci-fi, and any Stephenson fans. But they may have already heard of it.