Holly Barnet-Sanchez is an associate professor emerita of art history at the University of New Mexico, USA. She is the coeditor of Signs from the Heart: California Chicano Murals, also available from UNM Press, and a contributor to Mexican Muralism: A Critical History. Tim Drescher is an independent scholar in Berkeley, California, USA. He is the coauthor of Agitate! Educate! Organize! American Labor Posters and a contributor to Toward a People's Art: The Contemporary Mural Movement (UNM Press).