The introduction conveys the central aspects of adult education and helps to understand and categorize positions and approaches. The book provides a reflection and an approach to the individual central phenomena and the resulting consequences for adult education. This allows for the comparison and assessment of different perspectives and approaches. In this sense, the book aims to serve as a guide and can be used repeatedly as a starting point. Contents include: Perspectives on adult education and the education of adults, historical considerations, theoretical approaches, research, the quaternary sector of the education system: structures, institutions, activities, adult education as a profession, studies in adult education and the labor market.