How do I even begin to tell you how much I loved this book?! I was pretty sure I was going to love this because I totally loved the first two, but I had no idea this would be as amazingly awesome as it was!! Jennifer L. Armentrout sure has a way of blowing my expectations away with each new book of hers I read. Each book in this series has gotten better for me and I don't know how she can top this one, but I know she will. Now that I have gotten my fan girl stuff out of the way, I will continue. I have become very invested in the story and after the way Onyx ended I was super excited to read this one. The stakes are higher, the romance is hotter, and the tension is incredible!! In other words, this book rocked!! Being that this is the third book in the series, it's a bit harder to review, but I will do my best.Katy really steps it up in this one. I admire how tough she is and what she is willing to do. She has been through a lot, too much really, but she holds it together really well. She has a lot of guilt too and that is a lot of the reason why she feels like she needs to do certain things that are insanely dangerous. She has a few moments where she really breaks down, but I think she has become such a strong person. She lets her anger get the best of her sometimes, but she is still the same fun and snarky girl underneath the harder shell she now wears.I thought I couldn't love Daemon any more than I already did and boy was I wrong. Yes, he still has an ego, and he still has his moments of jerkiness, but the jerk stuff comes out with his protective side. Mostly we see a super sweet and caring Daemon, and yes, even very romantic! I was swooning all over the place while reading Opal. He was out to prove he really cared about Katy in Onyx, and now that he has her, he wants to keep showing her just how much she means to him. He will do anything for her. He will go through great lengths to make her happy and keep her safe. You can feel how much he cares about her.The other characters were just as great as always too. Blake was still a character I didn't want to trust just like in Onyx, but I still never really knew whether I could or not. He just gives me a bad creepy vibe, and the dude does do some pretty creepy stuff. Dawson is still very broken. With all that he's been through, I was surprised that he was able to start to be himself a little more. I loved seeing him slowly open back up to his siblings and Katy. Dee was in a rough place in this book. She is still very hurt and is having a hard time letting Katy back in. She spends most of her time with Ash and Adam grieving.The romance was AMAZING!! All of the chemistry is still there and it's even better. There is still the tension too since there are other more important and scary things going on, but they are just sizzling when they are together. We get all of the amazing hotness and build up that we all love!! I could go on and on about how much I love Daemon and Katy together and how much I loved every scene where they kissed or touched, but it's so much more than that too. I loved how they just were together. Just talking or trying to go on dates. Snuggling together and just sleeping. The romantic and sweet things Daemon would say to her or do for her. It was all just perfect even with nothing perfect about the whole situation they are in. They are like the bright light in the dark.This book gets intense. They are trying to find a way to get to Beth. They are waiting to see what will happen with Will, not knowing when or if he will come back. They can't trust anyone and they feel like they are walking into a trap no matter what they do. They face numerous dangers and I was holding my breath hoping and wishing that things would all work out. With emotions high, and tension at ridiculous levels, trying to work together towards a common goal isn't very easy, but they know that it's their only option. I was so tense reading this book. I felt the urgency, I felt all the emotions. I am so invested in the characters and the story that when they are going through something, I feel like I am going through it with them. Oh and the ending?! Yeah, I think that JLA tore my heart out! I'm pretty sure she is just going to hold it hostage for a while, but I am hoping that she will give it back. After reading the last pages of this book I wanted to throw things and stomp around like a child having a tantrum. I can't wait for Origin! I need that book like I need to breathe.