4.75 stars 
 If you asked me to summarize this I'd say: sociopaths with superhuman powers kill themselves and other people... in that order. 
 I have to say I liked the first half of the book better. Victor's internal struggle of jealousy and anger towards Eli but also not being able to hate him completely because he is still his best friend and how that friendship vanished and the hatred grew more and more was incredibly well portrayed. I kept asking myself: How could all of this happen? How could they loose all emotions except hate for each other? Or were they even able to feel anything but hate even before everything went to shit? 
 This, combined with the question of who is the good guy and who is the bad one or are there even good and bad guys, makes this book so different and amazing. 
 I experienced a constant shift of sympathy for the characters. At first I liked Eli, then Victor, at some point I wanted both to die and sometimes I wanted them get along again. It's impossible to see this as a black and white hero-villain story. They're both heros and they're both villains. Eli sees himself more as a hero but what he does is heoric only for HIM. Victor sees himself more as a villain, and it's true, but he also stops people form getting killed. For me, both of them are sociopaths. It seems like they were even before they became EOs but after "dying" they definitely experienced a detachment from emotion. And that raises the question: Is Eli really wrong? Aren't EOs really just shadows of who they once were? But then you get to know Sydney and you just love her and it makes everything confusing again... 
 All in all, I loved this! Everything is messed up and dark and twisted and I really, really enjoyed that. The only reason this didn't get a full 5/5 was that I didn't get this OMG THIS IS TOTALLY A 5/5 READ!!! feeling. Everything else was marvellous.