Despite having the best cover, this is definitely the weakest entry in the series. However I'm not really upset about that, the character of Celyet and the incredible worldbuilding/theology-related reveals and cliffhanger near the end that feels almost jarringly-good/complex compared to the rest of the book actually serves as a meta-level demonstration of this series's themes, and it kind of fits the structure of the series (the third book blows everything out of the water).
Celyet is one of the most relatable characters I've ever encountered specifically regarding an achingly profound and almost crippling hypersensitivity to the prospect of being misinterpreted and seen wrongly. I've never quite seen this depicted elsewhere, and the way it dovetails with the late-story reveal of What she is, is really thought-provoking for. I also enjoyed the depiction of Jibril the angel a lot, they are quite annoying, yet also touching and beautiful. And is much more edgy, daring, and abnormal than the fallen angel Lucifer from the previous book; though not nearly so much as G-d, or Tamar or Safirah the humans.