Full disclosure, I totally missed the "part 1 of a series" in the title of this so I was not expecting a cliffhanger ending. So be warned, you may have to wait a bit to get some resolution from these characters. That being said, I would also recommend this as a YA book as opposed to New Adult audiences. I will explain why in a moment.
Let's start with the things I really enjoyed about this novel. Based on the description I was expecting some intrigue and revelations and it did not disappoint. This fresh take on reincarnation and some prominent religious figures gave the story depth and kept me turning the pages. If you are looking for a bit of historical fiction with your paranormal romance, this is definitely the book for you.
A few things that I enjoyed less: the high school drama/immaturity of the main character. Now hear me out, I love a good YA story, this was not advertised as such so when Evey and Helen fight over Conrad it felt out of place and a bit annoying. I did like that Evey questioned everything that was being thrown at her and didn't take anything at face value. She asked a lot of questions and didn't go into full blown hero mode ignoring all other factors, which made her much easier to relate to. She grieved the losses and wasn't ready to move on, and asked for help when she needed it.
Conrad's character felt a bit creepy at times and I wasn't really rooting for him by the end of the book. Despite his history with Evey and the Concilium, the way his romantic interests came to light was a bit awkward. I cannot pinpoint exactly what bothered me about it, maybe the fact that he remembers their history and Evey doesn't, but it left me feeling uneasy.
As I stated earlier, I think this book would be better categorized as YA instead of New Adult, given the maturity level of several main characters, but I would still recommend it. The ideas and storytelling are new and interesting and I'm still mildly curious what will happen in the next book.