Ummm...Mark Billingham was an executive producer..
"I have little doubt that author Billingham would be mortified at what has been done to his brilliant book and beloved characters..."
Before you go all self important with the 'book was so much better' garbage, you may want to get your facts straight. Mark Billingham is listed as an executive producer, which, as I understand it, has an awful lot to do with how a film's made. No, I haven't seen the film, read the book, or even heard of any of it before looking at the review, but it just bugs the crap out of me when people think they own a movie just because they read the book. And to assume that the author might be disappointed without even looking into whether the author had a role in the movie adaptation? I'm pretty sure your review is useless.