4.5* 
 Man, what an exciting book! I didn't realise how much I missed Durango until I read this! I kind of forgot most of the first book (sad, I know), but I'm glad this could be considered a stand-alone novel. However, I'm eagerly anticipating the next book! (view spoiler)[ I pretty much need to know what happens to Vienne. I mean seriously, why would you end it like that?! Oh, right--to tortue us all! (hide spoiler)] I love the banter between Durango and his AI (artificial intelligence) in his brain, Mimi (a.k.a. his previous chief); they are quite entertaining (view spoiler)[ and I felt Durango's loss when Mimi was almost gone! So sad :( (hide spoiler)]. Vienne becomes more a character in this book; I felt like I got to know her more, and I'm very curious as to her feelings (like choosing to become dalit , which are like renegades thought of as scum, with Durango instead of dying a Beautiful Death). Readers really get to see more about her, like with her past and 
 I read this on my 10 hour flight to NY, which was an extremely uncomfortable flight, but this book made it more bearable. Also, because I had no access to the internet, I had to bookmark all the times Durango swore in a different language! I love the bookmarking feature on my Kindle now--why didn't I use this before?! Anyways, if you like Sci-Fi or action packed stuff (with a hint of romance), read this book now! Well, read the first one if you haven't already, too. :D 
 PS! I was very confused when they said that a certain new character was six... and that Durango was six when he decided to be a Regulator (like a military-ish person). About three quarters or so in, it registered that the age is in MARS years. Not Earth years. So, the real age is like 15-ish, I think? (Can't remember) It completely changed my image of the new character, which is fine because I thought it was odd for a six-year-old to have spiked, pink hair. Haha