In addition, for me it is not really a thriller (as this book was described by critics) and the story about the pair sometimes leads investigators to believe that this is a novel rose water . Too bad that the investigation was too long to implement. It took a while before "put me in it."
By cons, once the investigation is advanced enough to be interesting, the book until the end we can not let go.
In summary, do not go with the idea that it's a thriller or you will be disappointed and if you do not like the pseudo-love stories, avoid the book.
But other than that, the story is compelling and we want to know the result. I got a bit annoyed at first but past that, I enjoyed it a read. I've even advised some people around me.