ELISABETH SCHWARZKOPF. By Alan Jefferson. 285 pages. Boston, MA: Northeastern University Press, 1995. $29.95
THE COMPANION TO 20th-CENTURY MUSIC. By Norman Lebrecht. 415 pages. Paperback. New York, NY: Da Capo Press. $16.95
OTHER ENTERTAINMENT. By Ned Rorem. 336 pages. New York NY: Simon and Schuster. $25.00