This book is really intense! For those who have seen the movie "Jumper" or "Heroes" series, that's a bit like: characters with powers they do not necessarily make good use / characters who track to prevent harm , thinking to work for "the greater good";) The problem is that their methods are downright questionable (torture, blackmail, psychological manipulation ...); and in the end they are also bad, see worse than they track ... So much so that really raises questions about the border between good and evil. Moments "gory" violent and somewhat in the style of the books "Hunger Games" for those who know (the scenes of torture are especially shocks). But there also has erotic moments! Good surprise: the story takes place in France, in Paris. The characters are of Icelandic origin, which made me want to do research on Iceland that the superb levels landscapes air! A destination to consider for next vacation. Finally, I feel a bit empty and sad like every time I finish a book ... For me it has fulfilled all its functions: I was afraid, it made me think, it made me travel ... There is a mention of "not recommended for sensitive souls," I say, on the contrary, if you are sensitive read it! If you are insensitive, it will not do you much to read this book and if so why bother? Volume 2 I will buy the e-book but not right away. Indeed, I finally ordered a Kindle and c bluffing, the screen it really looks like a sheet of paper!