The textbook analyses and compares different systems and practices of adult education and adult education research worldwide. An important point of reference is the political, social and cultural contexts that impact adult education. The volume explains technical terms and provides a historical overview. Scientific theories and methods of international adult education are also presented. The role of international organisations is discussed, whereby the focus is extended to the non-Western world. Chapters on digitalisation, adult Education advocacy organisations, and international exchange programmes complete the volume. The textbook is an essential introduction to the field of international and comparative adult education. It is aimed at students, but also offers numerous suggestions and impulses for professional practice and research.