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.