Bringing together a comprehensive collection of newly-commissioned articles, this Handbook covers the most recent developments across a range of sub-fields relevant to the study of second language Spanish. * Provides a unique and much-needed collection of new research in this subject, compiled and written by experts in the field * Offers a critical account of the most current, ground-breaking developments across key fields, each of which has seen innovative empirical research in the past decade * Covers a broad range of issues including current theoretical approaches, alongside a variety of entries within such areas as the sound system, morphosyntax, individual and social factors, and instructed language learning * Presents a variety of methodological approaches spanning the active areas of research in language acquisition