‘John, we need your autobiography.’ ‘I thought I’d express my life experience in song.’ ‘That’ll be fine.’ This would be an odd agreement, and one the world would (rightly) be less than thankful for. But though not everyone plays music, we all have a relationship with prose. And recent years have seen a trend in rock memoirs away from the traditional ‘as told to’ (the method responsible for the footballer’s hagiography that often, in Martin Amis’s phrase, ‘runs the full gamut of human emotions from “gutted” to “chuffed”’) and towards autobiography proper: books written by the artists.