Book excerpt: The Routledge Handbook of Second Language Acquisition brings together fifty leading international figures in the field to produce a state-of-the-art overview of Second Language Acquisition. The Handbook covers a wide range of topics related to Second Language Acquisition: language in context, linguistic, psycholinguistic, and neurolinguistic theories and perspectives, skill learning, individual differences, L2 learning settings, and language assessment. All chapters introduce the reader to the topic, outline the core issues, then explore the pedagogical application of research in the area and possible future development. The Routledge Handbook of Second Language Acquisition is an essential resource for all those studying and researching Second Language Acquisition.