This book was fantastic! I have to admit that I was skeptical before I read it. I was afraid that maybe like many in its position this book would fall into the middle of the trilogy book slump because the first was so good but boy was I wrong! This book was just as exciting, action packed and emotional as the first. I absolutely loved it. I devoured it. The the plot is fast moving always handing you new twists and turns. There is action, adventure and even some romance. It's pretty much all you could want in a book. 
 As I said in my review for Defects the characters as very likable and relatable. Em has been turned into an outcast by her father and president Vider and yes she's a bit bitter but she's a good person and she even has a sense of humor. What I like about her is that she wants to help the people of Austin Valley. She wants justice. She won't let the fact that it's just her and a few other people rebelling stop her. 
 Rogue is amazing. He's a guy any girl would be happy to have by her side. He's resourceful, rugged and level headed. He is the rational counterpart to Em's emotional one. He also loves Em with all his heart. 
 Zach is Em's best friend. He's also their man on the inside. He's remained in Austin Valley and along with Em's sister he is the eyes and ears for their rebellion. Though emotionally involved he is able to continue to act as a spy and be detached enough to remain effective. He wants to help the people of Austin Valley and do what he can to assist Em and Rogue. 
 Nona, Em's sister has a larger part in this book which I like. She is brave and fights for what she believes in as Em does. 
 This book had a lot going on. Em and her friends have decided to officially start a rebellion. With the help of Parker, the doctor in the labs, and Ren, Em's uncle, many new discoveries are made. There is a ton of action and a bit of romance. This installment in the series is an excellent segue to the final book. I'm looking forward to seeing what happens next but will be sad to have the series end. 
 As with the first book the narrator fits the story and does an excellent job. She does an excellent job of portraying Em's emotions and often sweeps you up in her enthusiasm. She brings the characters to life. 
 I would like to thank the author/narrator/publisher for gifting me a copy of this audiobook in exchange for an honest review. All thoughts and opinions are unbiased and my own.