Michael Riedel, who has covered Broadway for this paper for nearly 20 years, is a friend of mine; in fact, I hired him to do the job back in 1998. So you are free to dismiss me when I tell you that his book “Razzle Dazzle†is not only one of the best histories of American show business ever published, but one of the great New York City books as well. But don’t dismiss me. I’m telling you about “Razzle Dazzle†because it tells a story people really need to hear right now — a story about how what the...