Book excerpt: This book presents an introduction to more than a dozen different types of Balinese gamelan, each with its own established tradition, repertoire and social or religious context. The instruments and basic principles underlying the gamelan are introduced, thus providing listeners with the means to better appreciate the music. Scores of beautiful color photographs, a discography, and a brief guide to studying and hearing the music in Bali, will prove indispensible to visitors and gamelan afficionados around the world.