Book excerpt: The Complete Guide to the Theory and Practice of Materials Development for Language Learning provides undergraduate and graduate-level students in applied linguistics and TESOL, researchers, materials developers, and teachers with everything they need to know about the latest theory and practice of language learning materials development for all media. The past two decades have seen historic change in the field of language learning materials development. The four main drivers of that change include a shift in emphasis from materials for language teaching to language learning; evidenced-based development; the huge increase in digital delivery technologies; and the wedding of materials developed for the learning of English with those for other second or foreign languages. Timely, authoritative, and global in scope, this text represents the ideal resource for all those studying and working in the field of language learning.