While I was in high school, my aunt and uncle used to call me “Marian the librarian,” and predicted that’s what I would become. I knew nothing about The Music Man, a musical of bygone era, in which a traveling salesman invades a wholesome Midwestern town and attempts to steal the heart of Marian, the town librarian. Out of idle curiosity, I watched it one day, and enjoyed it very much indeed.But that is not why I eventual...