Keith Potter, Kyle Gann, and Pwyll Ap Siôn, 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)