Robert L. Nicholas is an Emeritus Professor of Spanish at the University of Wisconsin, Madison. His Ph.D. is from the University of Oregon, and he taught at Wisconsin from 1965 to 1997. His scholarly interests focus on the modern period of Spanish literature, especially the Twentieth-Century theater and novel. He has published numerous articles in addition to his books The Tragic Stages of Antonio Buero Vallejo; Unamuno, narrador; and El sainete serio. He was the recipient of several research grants from the Graduate School of the University of Wisconsin, and for years directed teaching assistants in the beginning Spanish course at the University of Wisconsin. He served as departmental chairman for two terms, in the early 1980s and in the mid-1990s. He has authored or coauthored several high school and college Spanish textbooks, including ¡En camino! and ¡Adelante!

María Canteli Dominicis, an Emeritus Professor of Spanish at St. John's University, New York, was born in Cuba and taught college-level Spanish in the United States from 1961 to 2000. She holds a degree of Doctora en Filosofía y Letras from the University of Havana and a Ph.D. from New York University. Professor Dominicis is the author of Don Juan en el teatro español del siglo XX and Escenas cotidianas, a textbook for intermediate-level conversation courses. She is coauthor of a number of college textbooks, including Casos y cosas (an intermediate conversation text), ¡En camino!, and ¡Adelante! At St. John's University, Professor Dominicis served as chairperson of the Department of Modern Foreign Languages in the mid-1990s. At different times, she was the coordinator of the Spanish Division and the director of the language laboratory.