4.5 stars... such a good book!  I really wanted to know more about this world and how it worked. It was gross and intriguing at the same time. We got glimpses into this world and while it didnt answer all my questions it still worked for me. It gave me just enough to understand it. I would have liked a different POV bc Marcos clearly had some issues he was working through. This was  a short quick read, I finished in a day -- I just couldnt put it down... The pacing was good, only gripe is it felt little rushed at the end. I would have liked that worked out a little better but still an outstanding book!