Frances Berdan is Professor Emerita of Anthropology at California State University, San Bernardino. She is the author or co-author of fourteen books on aspects of Aztec culture, most recently Aztec Archaeology and Ethnohistory (Cambridge, 2014). Her 4-volume co-authored The Codex Mendoza (1992) won the James R. Wiseman Book Award from the Archaeological Institute of America in 1992. Michael E. Smith is Professor in the School of Human Evolution and Social Change at Arizona State University. Director of the ASU Teotihuacan Research Laboratory, he is the author of twelve books, including At Home with the Aztecs: An Archaeologist Uncovers Their Daily Life (2016), which won the Best Popular Book award from the Society of American Archaeology in 2017.