At first I thought this last book would be the weakest. Nope, that honor belongs to To Taste Temptation (book 1). Reynaud is unlikable for a portion of the book. He is redeemed beautifully. I liked Beatrice and her questions to Reynaud. She gradually gets him to talk about his experiences. I appreciated the depiction of PTSD, I felt it was realistic.
I'm happy to say, the traitor is unmasked. What was disappointing to me, was there was this build-up over the last 3 books, and then (whisper) boom. It lost steam and I thought it was over too quickly.