The introduction and tracking of reference to people or individuals, known as referential movement, is a central feature of coherence, and accounts for "about every third word of discourse". Located at the intersection of pragmatics and grammar, reference is now proving a rich and enduring source of insight into second language development. The challenge for second language (L2) learners involves navigating the selection and positioning of reference in the target language, continually shifting and balancing the referential means used to maintain coherence, while remaining acutely sensitive to the discourse and social context.The present volume focuses on how L2 learners meet that challenge, bringing together both eminent and up-and-coming researchers in the field of L2 acquisition. The chapters address a range of problems in second language acquisition (SLA) (e.g., form-function mapping, first language [L1] influence, developmental trajectories), and do so in relation to various theoretical approaches to reference (e.g., Accessibility Theory, Givenness Hierarchy). The global outlook of these studies relates to the L2 acquisition of English, French, Japanese, Korean, and Spanish and covers a diverse range of situational contexts including heritage language learning, English as a medium of instruction, and the development of sociolinguistic competence.