In recent years, researchers have acknowledged that the study of third language acquisition cannot simply be viewed as an extension of the study of bilingualism, and the present volume’s authors agree that a point of departure that embraces the unique properties that differentiate L2 acquisition from L3/Ln acquisition is essential. From linguistic, sociological, psychological, educational and cognitive viewpoints, it has become increasingly apparent that the study of L3/Ln acquisition can provide new evidence to help resolve ongoing debates in these areas of study. This volume uniquely provides a wide-ranging overview of current trends in the study of adult additive multilingualism from formal, psycholinguistic and sociolinguistic perspectives, adding new insights into adult multilingual epistemology. This collection includes critical reviews of L3/Ln morphosyntax, phonology, and the lexicon, as well as individual studies with unique language pairings including Romance, Germanic, Slavic, and Asian languages.

Maria Polinsky, Harvard University:
What does it mean to be a native speaker? The answer may differ for a monolingual or a multilingual person. This book explores unfamiliar territory, focusing beyond the monolingual native speaker model and challenging the reader to understand different shades of multilingualism. The reward for introducing a new viewpoint is in novel insights to many unanswered questions in linguistic theory, and this book is an important step in this direction.