The book is addressed to all those involved in foreign language learning and teaching. It takes the sequential organisation of code-switching at the tertiary level EFL classrooms as its subject matter. The book reviews recent findings and current theoretical positions, presents new data and interpretations, and sketches the organisation of EFL classroom talk. The value of Üstünel's book is that she synthesizes research from SLA, applied linguistics, and conversation analysis and helps us to see connections among language pedagogy, EFL classroom talk, and the structures of social action.