What accounts for the phenomenal success of an artist like Norah Jones? “There are sociological explanations. Critics point out, accurately, that young artists like Jones, who is twenty-five, and Josh Groban and Michael Bublé are selling soothing songs by the seashore to a much older audience. These artists’ faith in melody and acoustic instruments ostensibly provides evidence that not all musicians below the age of thirty are getting tattooed with runic symbols and sending viruses to each other on tiny, inscrutable batphones. Record companies have agreed to think that the older audience is their pot of gold. This is half science—the percentage of records being bought by listeners above the age of thirty is growing—and half hearsay.”