I could not finish this book. I went on holiday, taking only this book to read and still I could not force myself to continue reading it. 
 It's a shame because the plot is interesting and I would have liked to know what happened, but I just couldn't connect to the book. I did not like the way that it was written, with short sentences, very matter of fact. 
 I did not like any of the three main characters. Sam was boring and seemed to have no personality beyond the "I want to save EVERYONE, I always put others first" tendencies,which in the end were more irritating than anything. Astrid was too much of a stereotype. Sometimes it seems like she says things just to remind the reader that she is clever and a bit of a nerd, when really nobody would say that. It feels like she is trying to be Hermione Granger, but fails. Quinn is the kind of character which I usually love, a bit eccentric and a sense of humour - however throughout the beginning of the book (which is the only part I read) he came off as just grumpy and constantly moaning. 
 I'm sure that many would enjoy this book, perhaps it is meant for younger readers, but I just could not bear it.