Lida Baker is the author of more than two dozen print and digital books for students and teachers of English as a second or foreign language. Now a full-time author and editor, she previously taught ESL at the American Language Center, University of California, Los Angeles Extension. She lives in Los Angeles. Laurie Blass is a writer and editor specializing in print and digital English Language Teaching materials. She has an M.A. in Linguistics and a TESL certificate from the University of Pittsburgh and has taught ESL in the United States and France. She is the author/co-author of over 40 ELT titles representing a wide range of audiences, from adult education to English for academic purposes.