This book systematically explores and discusses English as a Lingua Franca (ELF) research methods frequently deployed by ELF researchers in analysing their data. It mainly covers three different approaches: corpus-based, both written and spoken, conversation analytic and narrative approaches. In addition to exploring these different approaches to ELF data, the volume also introduces case studies that utilise them in analysing data in both academic and workplace settings, which facilitates not only the understanding of the ways in which research is conducted but also its findings. Furthermore, the book discusses theoretical underpinnings of ELF research and its recent development in its first part. It is comprehensive both in understanding theory and exploring research methods which can be deployed in conducting ELF research. The book, therefore, will be of great interest and use for both ELF researchers and educators as well as undergraduate and postgraduate students who are about to embark on their ELF and ELF-related research, and also to those who are new to the field.