This brief review is written immediately after finishing the book. I suspect my view will adjust and change as I mull it over as it did whilst reading The Three Body Problem. Often, especially in the first half, things get a bit confusing - there is a lot of technical science (real and sci-fi) that sometimes bogged me down but there was also something that drove me to keep reading. It is odd, or rather different, and, especially as the story evolves, it made me think and I could not put it down. The ultimate premise is fantastic and I look forward to the next book in the series.