J. K. Chambers is Professor of Linguistics at the University of Toronto. He is co-editor of The Handbook of Language Variation and Change (with Peter Trudgill and Natalie Schilling-Estes, Wiley-Blackwell, 2002), co-author (with Peter Trudgill) of Dialectology (2nd edition, 1998), and also author of other books and scores of articles. He works extensively as a forensic consultant, and maintains a parallel vocation in jazz criticism, including the prizewinning biography Milestones: The Music and Times of Miles Davis (1998).