This book was freaking AMAZING!!!! Everything about it was superb, spectacular, and just utterly captivating. I loved every single minute of this book, and am even more excited for the next one. Opal starts right where we left off last time, and jumps right into the action. I wasn't sure how Ms. Armentrout would manage to blow my mind even more after Onyx, but holy alien babies, she did. Her writing is even more amazing, and the story is at its finest. 
 Let's start off with the characters....Katy is awesome. She is dealing with the aftermath of her kidnapping, and is forever changed. The beauty of this story is that Kat has shown true growth over such a short period of time. Gone is the Katy that was a shy, bookworm. Katy is now a badass hybrid that doesn't take anything from anyone. However, she hasn't lost her caring, vulnerable side. She still has to deal with the guilt of killing people, and let's just say the death toll in this book is high. I loved reading how strong Katy has become because it truly showcases the greatness of this series. 
 Daemon...there are no words to describe the absolute perfectness of Daemon. Sure, he isn't as cocky or arrogant in this book, but is that a bad thing? Uh...NOPE! Katy has changed him in many ways, and one of those ways is bringing out that soft side that our loveable bad boy has. He still has his hilarious moments where he's kind of an arrogant guy, but that made this book even better. Let's just say, I want my own Daemon. 
 Every single moment with Katy and Daemon was sheer bliss. I loved the cute moments, the scary moments, and everything in between. (view spoiler)[They do finally have sex in this one, but it is so beautifully written, and is not graphic at all. JLA knows her stuff haha (hide spoiler)]. 
 Dee is permanently scarred by Andrew's death, and leans on some unexpected people, and (view spoiler)[her relationship with Katy is basically broken. By the end of the book, there is some reconciliation, and hope for the future, but I can totally understand where Dee is coming from. However, I miss the old Dee, and want her back! (hide spoiler)] Some other people make reappearances in this book (view spoiler)[*cough*Will and Blake*cough*, (hide spoiler)] and there are some shocking repercussions. I knew something was up with a certain someone, and even though I was hoping for the best, sadly I was proven right. 
 Beware...there is a MAJOR cliffhanger. Actually, it's not even a cliff, it's a mountain. And if there's something bigger than a mountain, it's that. This is the mother of all cliffhangers, and all I can say is NOOOOOOOO!!! WHY???!!! How can you do this to us Ms. Armentrout? I actually threw my book after I read the ending. I scrambled because I had to be missing pages. I thought, Surely, this CANNOT be the ending?! But, it is. And, I am eagerly awaiting the next book. Ms. Armentrout has weaved a magnificent tale that grabs you and never lets you go. Pick this up immediately! 
 5+++++++++ alien babies