An Introduction to Applied Linguistics provides a complete, authoritative and up-to-date overview of the state of the field. Divided into three sections the book covers: a description of language and language use; essential areas of enquiry; and the four skills and testing. The Third Edition of this textbook provides an extended survey of a central element of Applied Linguistics over 17 chapters, 2 brand-new chapters on Multilingualism and Forensic Linguistics, and activities and further reading throughout. This book is ideal for students of applied linguistics, TESOL, and second language pedagogy as well as practicing teachers and researchers wishing to update their knowledge.