This was so, so good, maybe even better than the first book. 
 Lila is great, I love her internal dialogue and the way she sees things. It made even the most intense moments funny in a weird sort of way. 
 Again I didn't predict most of the twists, especially two things we find out about Jack. I think that's part of what made me love this book so much, usually I figure out what's going to happen or the major plot twists but I didn't here and it made me want to read on so that I could finally know what was going on. 
 Like Lila, Nate and Suki managed to make me laugh a lot, even when things were getting a bit crazy. I also liked how we got to see some of Alex's insecurities, even though he's this really tough guy he does doubt himself. 
 If you're prepared for lots of twists and turns and a crazy amount of action then go read this. 
 Edit: Actually I lie...I do have two small issues with it. 
 The use of the word "mum" instead of "mom". I can understand Jack and Lila saying it because their dad is english and it's probably how they've been brought up, but Alex and some of the other characters? They're all American, so surely they would say Mom. 
 Also please give me an epilogue...please? Ok so that's not really an issue, I just don't want the book to be over.