I thought that the book, overall, was great, here's why: 
 - More action than the first one. There's a reason for what they are doing: Change the world. They don't just run away all the time 
 - Kenji is SO cool. Like he's always fun and happy and all. I love him. 
 - We get to discover more about Juliette's power, which is more than killing people. 
 - The writting style is considerably better than the first book. Almost no strikesout and less repetition 
 However, here's why I gave it 3.5 stars: 
 - Jesus Christ I was pissed of by Juliette! She's just so mixed up and fucked up. Yes it's difficult to choose someone to love but stop trying to love both. She's just playing with both of them! 
 - I HATE Warner. He's so annoying! He loves her, then hate her, then he's all sweety pie and then he tries to shot her. Shit I hate him. 
 So yeah. I gave it 3.5. I might read the third one but I'm annoyed with that serie...