There is a reason that Mark Billingham's original novel Sleepyhead was such a huge Bestseller when it came out. Watching the TV show version you would be forgiven for wondering what all the fuss was about. The novel was an ripping edge-of-the-seat page turner with twists and turns that would make your head spin. This is the most unfaithful adaptation imaginable, with terrible writing and clichéd characters and a completely re- written and boring plot. The book does make brief mention of one of DI Thorne's previous cases, a gay serial killer. The TV show decides to expand this mention while simultaneously reducing the story from the book to virtually nothing. The resulting story is a deeply confusing hotchpotch of incongruous ideas and fumbled attempts at carving a new direction. TV SHOW ENDING SPOILER: The killer from the book is completely different to the show with a genius MO missing from the show version. I have little doubt that author Billingham would be mortified at what has been done to his brilliant book and beloved characters.