Simply amazing! Review to come :) 
 Updated 4/14/13: 
 Have you ever had one of those books where after you finish it, you need to just take a deep breath to let the events and amazingness sink in? This is one of those books. Jennifer Armentrout is the queen of writing! I've said it before, and I'll say it again...this woman is full of some serious awesome sauce!!! Ms. Armentrout has yet again sucked us into the world of Alex, Aiden, and Seth, and leaves us gasping at every twist and turn she throws our way. I'm going to try to keep the spoilers to a minimum, but there are no guarantees. You have been warned ;) 
 The story picks up right where Elixir left off. Alex is now off the Elixir, and still imprisoned with Aiden keeping an ever-dutiful watch over her hoping that she'll break the bond that exists between her and Seth. Every single minute of this book was just extraordinary! I was on the edge of my seat (well bed if you want to be technical) every step of the way because I had no clue what was coming next. The scenes at the beginning between Alex and Aiden were heartbreaking because you could feel the tension and Aiden's hope dripping off the page. Once Alex breaks the bond (and I did a huge YAY!!!), the scenes between Alex and Aiden were both heart-wrenching and heart-warming at the same time. How can an author even remotely do this you ask? The answer is because it's Jen Armentrout, and she can do anything she wants! She can make you feel like you're on a car ride to a place called Crazy Emotiontown, USA, and you enjoy every single second of it. Aiden's guilt over everything, including giving Alex the Elixir was utterly heartbreaking and tear-inducing. I completely understood it, but what I loved even more was that Alex was there every step of the way trying to pull him out of his funk. If that's not love, I don't know what is! 
 The entire story is one big thrill ride, from Alex trying to kill Aiden when she escapes, to Aiden and Alex going to the Underworld, to the whole Scooby gang trekking to the Dakota Covenant. I loved how we got to see Alex and her developing powers. It was so interesting to read, and Jen did an amazing job at bringing a very difficult concept to life and be understandable. I also highly enjoyed the secondary characters. They have such a strong role and presence in this novel, and I love seeing how they develop. After this novel, they definitely aren't secondary characters anymore...they're leading characters. 
 The moments between Alex and Aiden were steamy, sexy, and just adorable. My favorite line was when Alex and Aiden were in the Underworld and Aiden said, "I'd fight off a horde of spiders for you." Not only did it have me cracking up, but it was sooo cute! Being deathly afraid of spiders, I kinda want a guy to say that to me now too ;) Alex is one of my favorite heroines of all time. She is unbelievably strong, tough, and hilarious every step of the way. I just love her! 
 I was so proud of myself for guessing who the god was that was behind all of the problems! Jen creates this world where you can never guess, and I just happened to guess correctly. Trust me, the story isn't predictable in any way though because I didn't see the end coming by a mile. And let's just say, any love I had for Seth is now completely gone. I hope Alex exacts her revenge on him so hard that he doesn't know which end is up! I've been Team Aiden since the beginning, but Seth was slowly worming his way into my heart. But that is no more! Goodbye Seth, you little butthole! 
 This is definitely a must read for any Covenant fan. There will be tears, shocks and surprises, and aww-moments that will leave any fan begging for Sentinel. Everything about this book is spectacular. Plus, the cover is absolutely gorgeous! This is definitely one of Jen's best books to date, and I for one can't wait to read Sentinel! 
 10+++++++ stars