I was completely hooked on the book from the start, just to see how innocent and confident they could be. And, obviously, the answer to this question is very. However, to me, the little question in this story is not who is in that situation - which seems a bit too obvious, even if I am ready to be wrong - but more about why. It is also about observing the emotional damage and devastation that the loss of their child causes to the couple at the center of this story - Meg and Marc.Anyway, it was a bit long and although there were quite a few red herrings I figured out who the culprit was very early on. I like when you just discover the thrilling things near the end.