This book serves as an introduction to corpus linguistics (CL) for graduate students and researchers in Applied Linguistics, especially in the domains of language learning and teaching. It provides a structured and accessible approach for those new to CL, equipping readers with the foundational concepts and tools required to analyse language corpora autonomously in research related to language learning and teaching. It also contextualises CL's development over the past four decades, offering critical reflections on its practices and applications. Each chapter integrates recommended readings and highlights central concepts, guiding readers in applying CL methods to their own studies. By the end of the book, readers will have gained the knowledge and practical expertise needed to apply corpus linguistics methods in conducting robust and innovative research.