Theory and Practice of Second Language Acquisition vol. 8 (1), 2022, pp. 179–182 https://doi.org/10.31261/TAPSLA.10425 David Singleton and Larissa Aronin (Eds.), Twelve Lectures on Multilingualism. Bristol: Multilingual Matters, 2019, ISBN 978-1-78892-205-0 This timely and most welcome handbook includes a state-of-the-art over- view of multilingualism research from a variety of angles and perspectives. It is organized around four main parts dealing with (i) multilingualism in society and education, (ii) aspects of individual multilingualism, (iii) the psycholinguis- tics and neurolinguistics of multilingualism, and (iv) forms of multilingualism in the past and present. Part 1 of the book on educational and societal perspectives includes four lectures. The first two chapters provide a comprehensive description of what multilingualism entails. Aronin presents defining features of a very complex phenomenon. She refers to historical and current multilingualism. As Aronin puts it, language use has changed dramatically as some languages are more dominant than others. This idea leads to the notion of dominant language constellations (DLC) also presented in Lecture 2. Aronin and Gabryś-Barker both refer to DLC as a new stable pattern of organization that shows the lan- guages employed in a given speech community and how these are used. This dynamic description accounts for reality of language use both at an individual and societal level. As argued by Gabryś-Barker, considering DLC as an ap- proach may change actual perspectives in research. The way participants and communities are described in bilingualism and multilingualism studies would be more realistic and could thus help explain patterns of multilingual language acquisition and use. Interestingly, Gabryś-Barker raises another important con- tribution of multilingualism research to applied linguistics in general, namely, that of qualitative methodology. Currently, many scholars argue for the need to use mixed-methods and it often involves data triangulation and the inclu-