The Author: Zygmunt Frajzyngier, Humboldt Research Award winner and Professor of Linguistics at the University of Colorado in Boulder, is the author of descriptive grammars and dictionaries of languages belonging to three branches of Chadic. He has published numerous comparative and cross-linguistic theoretical studies and has done fieldwork in Ghana, Nigeria, and Cameroon. The author has held visiting appointments at Bayero College in Kano (Nigeria), the Max Planck Institute for Evolutionary Anthropology, Leipzig, CNRS, Nice, the University of Nice, and LaTrobe University (Australia).