"A long-awaited textbook for students and scholars interested in state-of-the-art corpus-based approaches to variation in World Englishes, Learner Englishes and English as a Lingua Franca. The combination of engaging writing, useful exercises and nuanced discussion of models and analytical tools make this an invaluable contribution to the fields of corpus linguistics and World Englishes."Elena Seoane, Universidade de Vigo, Spain"This new book by Lange & Leuckert is an excellent introduction and a very welcome overview of corpus linguistic approaches to World Englishes, which ports students right into the middle of exciting research questions. What is particularly enticing are the many case studies and exercises, which allow students to test their hypotheses and replicate some of the results."Gerold Schneider, University of Zurich, Switzerland