Book excerpt: Study and residence abroad are important for adult second language learning, promoting oral skills, fluency and sociopragmatic competence in particular, alongside broader intercultural competence. However learner achievements during residence abroad are variable and cannot be fully understood without attention to the social settings in which learners engage, and the social networks they develop. This edited collection explores the relationship between sociocultural experience, identity and language learning among student sojourners abroad. Three broad themes are identified: the contribution of different settings (host families, student exchanges, work placements etc) to language learning opportunity; the role of social networks in sojourners' language practices and learning success; and their evolving social identities. The book is relevant for a readership interested in informal second language learning, as well as for managers of residence abroad programmes.