A short biography on American composer Robert Ashley has been published by University Of Illinois Press, in their American Composers series (which also includes books on Christian Wolff, Carla Bley, John Cage and others).
Ashley founded the musicians collective Sonic Arts Union in the mid 1960s with Alvin Lucier, Gordon Mumma and David Behrman. The book draws on interviews and Ashley's early years and his effect on the post-Cageian avant-garde of the 60s and 70s, also looking at his major TV operas including Perfect Lives (performed last year in Spanish at London's Serpentine gallery).
The 184 page book is by music writer Kyle Gann, correspondent for The Village Voice and the author of books on Conlon Nancarrow and John Cage's 4'33". More details here.