William Croft is Professor of Linguistics at the University of New Mexico. His books include Typology and Universals (CUP 1990, second edition 2003), Syntactic Categories and Grammatical Relations (University of Chicago Press 1991), Explaining Language Change (Longman 2000), Radical Construction Grammar (OUP 2001) and Cognitive Linguistics (with D. Alan Cruse; CUP 2004).