James R. Heintze 
Perspectives on American Music since 1950 [PDF ebook] 

As the century comes to a close, composition of music in the United States has reached little consensus in terms of style, techniques, or schools. In fourteen original articles, the contributors to this volume explore the broad range and diversity of post-World War II musical culture. Classical and jazz idioms are both covered, as is the broad history of electronic music in the United States.