Defining a discipline: archival research and practice in the 21st century: essays in honour of Richard J. Cox: edited by Jeannette A. Bastian and Elizabeth Yakel, Chicago, Society of American Archivists, 2020, 322 pp., $75 (soft cover), ISBN 978-1-945246-27-2. Issue 4 (2nd October 2021) - Piggott, Michael