'The Magpie Murders' by Anthony Horowitz

Watching an adaptation rather than reading the book always feels like cheating, but sometimes I can't resist.  There are just too many great stories out there and so many different ways to tell them well.  Besides, when the screenwriter is Anthony Horowitz and he's adapting his own novel, 'Magpie Murders', you know you're in safe hands.  Or as safe as they can be when there's a villain on the loose...