Keith Potter, Kyle Gann, and Pwyll Ap Sion, eds. 2013. The Ashgate Research Companion to Minimalist and Postminimalist Music. Burlington VT: Ashgate. 458 pp. ISBN 978 1 4724 0278 3 (ebook) ISBN 978 1 4094 3549 5 (cloth) ISBN 978 1 4094 3550 1 (PDF)