They demonstrate the way these musics constantly cross-pollinate each other, transgressing generic boundaries, and how contemporary composers, producers, and musicians now work within complex networks of association and influence: New York art rockers Sonic Youth release a CD of works by John Cage and other avant-garde experimentalists; Bjork interviews Karlheinz Stockhausen for a music magazine and Derek Bailey, the septuagenarian founder of Free Improvisation, collaborates with Drum 'n' Bass producers. Each chapter opens with an introduction that situates and interconnects the writings to follow and concludes with an extensive bibliography and discography. The book also includes a comprehensive glossary of terms and phrases such as 'Ambient,' 'Dub,' 'just intonation,' and 'modal improvisation.'