John Cage, whose pieces dazzled and confounded audiences for six decades, hardly seems the easiest of subjects for the biographer, but this is a well-researched, coherent, quite readable account of the composer and his work. What comes across is a man who was ferociously driven to create music and to promote it to those who could most effectively advance it. Cage was an iconoclast, yet he developed relationships—often symbiotic—with some of the iconic artists of the past century, including Arnold Schoenberg, Jasper Johns, Marcel Duchamp, Buckminster Fuller, Pierre Boulez, Robert Rauschenberg, and longtime companion Merce Cunningham. What also comes across is a humanity and openness that served Cage well in his personal life and his work, personified in his advice to young percussion student Cunningham: “You were playing everything absolutely perfectly. Now go a little further and make a few mistakes.”