Shield & Shade

I had a good time. While the beginning gave me YA vibes, it quickly turned not-YA over the course of the book. It was super action-packed and exciting, although I think I may have missed out on some details or just not have known the backstory from the original series since I haven't read it. Quite a lot of times I felt like this book was continuing a whole history that I'm not really aware of, like this great war between the vampires and the angels? How and why did Corinth kinda take away the vampires' vampiric natures? How and why is he a Nephilim? I think it's mentioned that he has an angelic father, so is Susan still his mother? If yes, how and why did that procreation happen? Why did Gabriel kidnap Zoey when she was 5? (Not sure if this was answered in the book or not) Is Zoey gonna turn out special like Corinth? I really thought Zoey was going to suddenly unleash and do some OP thing to defeat Angela and/or Trevor at the end, but that didn't happen. I also can't really believe Peter is dead somehow, I feel like he'll come back in the later books