I really loved this book. Parts are viscerally heart breaking, others peaceful, and others still are wonderfully human. This book has so many wonderfully integrated references to folklore, library history, and theatre. 

God being a woman and making the arch angel who are working in her stead the antagonist of the novel is narratively, incredibly interesting, bringing into questions of biblical good versus moral good, and it acts as a reminder that being a hero does not necessarily imply goodness just as being a villain doesn't necessarily imply evil.
The novel's twists are artful. I had not expected Leto's suicidal ideation to have been pushed to it's breaking point by Andras, as had I not expected Claire to be a murderer, nor Leto to be Claire's grandson. Andrea's calculated betrayal was well crafted and the library's stand against him was glorious. Claire's willingness to unwrite the souls of those who are a threat to those she loves is a gorgeous character flaw. I'm glad she wasn't guilted out of it. I look forward to seeing more of Romiel in hell.

It feels like I've met a collection of pleasant new friends and I look forward to knowing them more as the series progresses.