A really good concept - well written, lean, tense, well paced...and then came the ending. I am being generous but, really, I should knock off a star for that ending. What, did he just get bored or something? It didn't help that the edition of the book I was reading still had about 40 pages left (which turned out to be filled with a 'bonus' short story - I don't want a short story, I want a proper ending, dammit!). So when I saw the 'acknowledgements' on the next page it came as a real shock. Still, it's better than a lot of the recent crop of so-called horror books that have been released later, so I'm still giving it for stars. Although I will deduct it if this turns out to the first in trilogy zzzzzz.