My strongest memory of a short visit to Minneapolis is of a supermarket which sells antique furniture and live lobsters. I have never been anywhere which seemed to take its affluence so much for granted. Almost the only other thing I know about the place is that it is the home of Prince (the celebrated performer of popular songs, m’lud). As a youth – poor, black, and very rude – his presence behind a trolley at the lobster counter can hardly be imagined. So it was with a thirst for understanding that I began reading Prince: A Pop Life.