American composer John Cage (1912-1992) was without doubt one of the most important and influential figures in twentieth-century music. He spent much of his career in pursuit of an unusual goal--giving up control so that sounds can be sounds as he put it. As well as composing around 300 works he was also a prolific performer writer poet and visual artist. This Companion celebrates the richness and diversity of Cage''s achievements and provides readers with a fully rounded portrait of a fascinating figure.