So very good. I've been waiting for Hunter's story since he was introduced four books ago (Veil of Midnight). He's the one you just know you're going to love the most out of the series (though Teagan still has a special place in my heart). What I really loved about this book is that we get to see Hunter really grow. Not only has Hunter been through hell growing up but Corinne has been put through hell since she was abducted 75 years ago. 
 Both are victims of Dragos. Both are working through pain and anger. Both find comfort in the other. Not only do we learn the terrible details of what happened to Corinne but a little more light is shed on Hunter's origins and time as one of Dragos's assassins. We also discover the origins of the Hunter Project which created the assassins for Dragos. 
 Something I really enjoyed is that because Hunter's situation and upbringing he's never really been with a woman. Corinne has been with a man but never willingly. While it did seem unlikely that she'd want to become intimate with any man after her ordeal, she's likely had plenty of time to come to grips with what happened to her, making her desire for Hunter seem real. Because of the brutality of Corinne's "experience" it really is like she's never been with a real man before. So bother Hunter and Corinne are learning together. 
 One of my favorite moments is the first time Corinne talks about music with Hunter and his confusion about the lyrics. It is hilarious and so innocent. 
 The only thing that has kept Corinne going is something Hunter fears will split them apart but also helps Corinne understand what she's getting into before Hunter helps her find exactly what she's been looking for. 
 Adrian also tosses in a horrible twist that leaves the Order in panic and we get to see Chase spiral out of control before everything rights itself in his book which I assume is the next book (Darker Than Midnight). We are also introduced to a couple new characters which I believe will extend the series though I'm not sure if Adrian plans to skip ahead in time or if we'll have more Breed males in coming soon. 
 Overall the series is very entertaining and this book in particular is one of the best in the series.