Book excerpt: This edited book examines the use of English as a Medium of Instruction (EMI) in a variety of international higher education contexts. The internationalization of education – indicated by increasing mobility of students, staff and ideas, as well as by policies and programmes put in place to facilitate educational exchange - has led to increasing adoption of English as a Lingua Franca (ELF) for educational purposes. In this book, the authors present the results of empirical research into the implementation, assessment, development and use of EMI programmes in different settings, presenting the case for more structured training of teachers and staff. It will be of interest to second/foreign language teaching and administrative staff, as well as anyone else involved in teaching in English at higher education level.