Colin Baker is Emeritus Professor at Bangor University, UK. He is the author of research publications, books for parents and an encyclopedia, all on the subject of bilingualism, as well as the 5 previous editions of this textbook. He is the former co-editor of the Bilingual Education and Bilingualism books series for Multilingual Matters.
Wayne E. Wright is Professor and Barbara I. Cook Chair of Literacy and Language, Purdue University, USA. He has published extensively on bilingual education and bilingualism, and is the co-editor of the Journal of Language, Identity, and Education and the Bilingual Education and Bilingualism book series for Multilingual Matters.