Totally essential guide to sound art: a 304 pages book in hard cover + a CD with pieces from Bill Fontana ('Harmonic Bridge'), Steve Roden ('Rust'), Jean Dubuffet ('Terre foisonnante'), Destroy All Monsters ('Jam Smear'), Anthony Burr et Charles Curtis ('Still and Moving Lines of Silence in Families of Hyperbolas' (1973-74) from Alvin Lucier) and Bernhard Gal ('57A').Over the past century, an art form has emerged that draws from the worlds of visual art and music. Sound art's roots can be found…