Rules for Perfect MurdersFiendish good fun ANTHONY HOROWITZ If you want to get away with murder, play by the rules Years ago Malcolm Kershaw wrote a list of his 'Eight Favourite Murders' for his Old Devils mystery bookshop blog. Among others, it included those from Agatha Christie's The ABC Murders, Patricia Highsmith's Strangers on a Train and Donna Tartt's The Secret History. Now, just before Christmas, Malcolm finds himself at the heart of an investigation as an FBI agent