Book excerpt: Language Disorders in Bilingual Children and Adults, Third Edition, provides speech-language pathologists, advanced students in communication disorders programs, and clinical language researchers with information needed to formulate and respond to questions related to effective service delivery to bilingual children and adults with suspected or confirmed language disorders. The bilinguals of interest represent varying levels of first and second language proficiency across the lifespan. That is, bilingualism is not determined here by proficiency in each language, but rather by the individual's experience or need for two languages. In separate chapters, the book synthesizes the literature on bilingual children and adults with typical and atypical language skills. These chapters give the reader a deep understanding of the multiple factors that affect language development and disorders in those who rely on two languages for meaningful interactions. Chapters on assessment and intervention issues and methods are then presented for each population. For children, the text focuses on developmental language disorder but also discusses secondary language disorders (such as autism spectrum disorder) in bilingual populations. For adults, the focus is on aphasia, with additional discussion of dementia, traumatic brain injury, and right hemisphere disorder. Although child and adult, typical and atypical populations are presented separately, all are considered within a unifying Dynamic Interactive Processing perspective and within a new Means-Opportunities-Motives framework for understanding language disorders in bilinguals. This broad theoretical framework emphasizes interactions between social, cognitive, and communicative systems to form the basis for very practical implications related to assessment and intervention. This third edition has been completely updated to reflect the current research on bilingual populations and the best practices for working with them. Studies at the intersection of bilingualism and language disorders have expanded to include additional disorders and new language combinations. The authors synthesize the current literature and translate it for clinical use. New to the Third Edition • Coauthors Kerry Danahy Ebert, PhD, CCC-SLP and Giang Thuy Pham, PhD, CCC-SLP • Updated literature review and references to reflect new research on bilingualism, cultural competence, cognitive advantages and clinical practice with linguistically diverse populations • Case studies on assessment with bilingual children and adults • Additional tables and figures summarizing key information • Available evidence on additional child and adult language disorders in bilinguals • Updated extension activities and resource supplement