Bad News by Edward St Aubyn is, quite simply, the best book ever written about drugs. Thomas de Quincey, Charles Baudelaire, Jean Cocteau, William Burroughs, Hunter S. Thompson, Irvine Welsh and Will Self may all be writers roped together like mountaineers heading for the summit, but it is St Aubyn they will find at the top. I first came across the book about five years ago. There it was, quietly glowing away on a friend’s shelf. And from the moment I picked it up I knew it was a work of perfection. It fitted my own experience as seamlessly as a silk glove.