As pop music drifts away from many people’s lives, so its literature grows ever more serious and weighty, as though aware that this is an art form approaching the end of its time. Having had the pleasure of opening the first volume of Mark Lewisohn’s planned three-volume history of the Beatles and then fallen into a deep sleep attempting to read it, I feel only a sense of impending doom when presented with yet another vast tome of unimpeachable scholarship into the ephemeral.