Marty Knorre was formerly Associate Professor of Romance Languages and Coordinator of basic Spanish courses at the University of Cincinnati, where she taught undergraduate and graduate courses in language, linguistics, and methodology. She received her Ph.D. in foreign language education from The Ohio State University in 1975. Dr. Knorre is coauthor of Cara a cara and Reflejos and has taught at several NEH Institutes for Language Instructors. She received a Master of Divinity at McCormick Theological Seminary in 1991.

Thalia Dorwick is Editor-in-Chief of Humanities, Social Sciences, and Languages for McGraw-Hill. She is in charge of the world languages college list in Spanish, French, Italian, German, Japanese, and Russian. She has taught at Allegheny College, California State University (Sacramento), and Case Western Reserve University, where she received her Ph.D. in Spanish in 1973. Dr. Dorwick is the coauthor of several textbooks and the author of several articles on language teaching issues. She was recognized as an Outstanding Foreign Language Teacher by the California Foreign Language Teachers Association in 1978.

Ana María Pérez-Gironés is an Adjunct Assistant Professor of Spanish at Wesleyan University, Middletown, Connecticut, where she teaches and coordinates Spanish language courses. She received a Licenciatura en Filología Anglogermánica from the Universidad de Sevilla in 1985, and her M.A. in General Linguistics from Cornell University in 1988. She is a coauthor of ¿Qué tal?, Fifth Edition.

William R. Glass is the Executive Editor for Spanish at McGraw-Hill, and he is also in charge of the McGraw-Hill Second Language Professional Series. He was an Adjunct Professor of Spanish at The Pennsylvania State University, where he taught both undergraduate and graduate courses in language and applied linguistics. He received his Ph.D. from the University of Illinois at Urbana-Champaign in 1992 in Spanish Applied Linguistics with a concentration in Second Language Acquisition and Teacher Education (SLATE). Dr. Glass’ research interests include second language reading theory and second language acquisition in tutored contexts. He is also a coauthor on Manual que acompaña ¿Sabías que… ?, another McGraw-Hill textbook series.

Hildebrando Villarreal is Professor of Spanish at California State University, Los Angeles, where he teaches undergraduate and graduate courses in language and linguistics. He received his Ph.D. in Spanish with an emphasis in Applied Linguistics from UCLA in 1976. Professor Villarreal is the author of several reviews and articles on language, language teaching, and Spanish for Native Speakers of Spanish. He is the author of ¡A leer! Un paso más, an intermediate textbook that focuses on reading skills.