IMAGINE A corporation whose ambitions are un­bounded and whose main product seems indispensable. Imagine that it has threatened to withhold this product in order to impose its will on competi­tors

ELISABETH SCHWARZKOPF By Alan Jefferson. Illustrated. 285 pp. Boston: Northeastern University Press. $29.95. THE TWISTED MUSE Musicians and Their Music in the Third Reich. By Michael H. Kater. 327 pp. New York: Oxford University Press. $35. The only…

In Harmony Emblems of Mind: The Inner Life of Music and Mathematics. by Edward Roth-Stein. Times Books. 263 pp. $25.00. Music is the most radically elusive of the arts. It

In his house in Jerusalem, Gershom Scholem, the great historian of Jewish mysticism, kept a painting, Paul Klee's Angelus Novus. It was willed to him by a friend of his