4.5 stars? I'm rating it 4 because I was a little underwhelmed after all the praise, but this was still an imaginative and unique sci-fi. Honestly, I'm probably just too stupid to appreciate it, but all the mathematics and currents made it difficult to get into it. It's also very short.

tldr; I loved this, but I didn't love it as much as I expected. Maybe I should have read the whole trilogy in one or something.