This textbook offers an introductory overview of eight hotly-debated topics in second language acquisition research. It offers a glimpse of how SLA researchers have tried to answer common questions about second language acquisition rather than being a comprehensive introduction to SLA research.

Vivian Cook is Emeritus Professor, Newcastle University, UK. He has been researching in the fields of second language acquisition and writing systems for over 45 years and was founding President of the European Second Language Association (EUROSLA).

David Singleton is Professor, University of Pannonia, Hungary and Fellow Emeritus, Trinity College, Dublin, Ireland. He has published widely on second language acquisition, multilingualism and lexicology and is the series editor for the SLA series published by Multilingual Matters.