Book excerpt: This book unites a range of emerging topics in the burgeoning transdisciplinary fields of second language acquisition and interculturality in a study abroad context. It explores key issues, trends and approaches within each strand and how the strands relate to one another, painting a big picture of the diversity and complexity underpinning second language acquisition in a study abroad context. The chapters highlight themes such as social networks, input and interaction issues, learner identities and study abroad in lingua franca contexts, while also presenting other themes spanning the breadth of second language acquisition and interculturality research, such as individual differences and linguistic development. This comprehensive and cohesive volume showcases the latest innovative research using quantitative, qualitative and mixed method approaches across a range of source and target language learner cohorts, and highlights emerging themes and directions for future research.