I was excited to see Peter Watts had completed a follow up to Blindsight. I did wonder where he was going to take things given how Blindsight ended but he has managed to build a good, related story in his world where humanity has evolved past itself. I have only given this 4 stars as opposed to the 5 I gave Blindsight. The main character was not as sharp and interesting and the story did not engage me as much. It is extremely well written and very thought provoking. I suspect the density of ideas and the flow of the novel will become clearer on a re-read. As this wasn't available on Kindle, I splurged and bought a hardback. I am glad I did.