Sylvia Madrigal Velasco (B.A., English, Yale University) has worked in foreign language publishing for 27 years. Her extensive career has included working with all the major higher education textbook publishers. In addition to her work on NEXOS, Second Edition, she is a co-author of �Expr�sate!, a Holt, Rinehart and Winston high school program.
Mara Carreira is Associate Professor of Spanish at California State University, Long Beach. She holds a Ph.D. in linguistics from the University of Illinois, Champaign. Carreira has written linguistic notes, profiles of well-known Hispanics, and heritage learner annotations. She is active in issues relating to heritage learners.