Book excerpt: This book is part of an encyclopedia set concerning the environment, archaeology, ethnology, social anthropology, ethnohistory, linguistics and physical anthropology of the native peoples of Mexico and Central America. The Guide to Ethnohistorical Sources is comprised of volumes 12-15 of this set. Volume 13 presents a look at pre-Columbian Mesoamerican from a combined historical and anthropological viewpoint, using official ecclesiastical and government records from the time.