When I first started this series, one of the things that I liked best was that there was a scientific explanation for the wonders and signs of the end of days that Luca was inquiring about. I feel like the 3rd book, and now this one, departed from that. There was no explanation about what the Alchemists were doing. And now this “Being” is never explained. I would like a return to that.

I also would like to see Isolde’s story progress a little more. I feel like very little on that front has been accomplished since book 2 began.