Thrillers are very much in vogue at the moment, and I seem to be reading a lot of them for some reason... This one had me gripped. I love books with a dual narrative, and in this story it adds to the whole, "He's behind you!" pantomime type feeling. The police investigation POV was interesting until the completely unnecessary daughter sub-plot was introduced - why? There was already enough going on, and I really didn't care about Grace at all. The 'twist' felt like a bit of a cheat, and I think I would've been happier if the author had stuck to the predicted ending - somehow, it would've been more satisfying, and way more plausible. But I can't deny that I devoured this, so four stars it is.