The volume discusses co-authorship in literature, sciences and art from a historical, comparative, cross-cultural and interdisciplinary perspective. The contributions focus on texts from India, early China, the Middle East, Graeco-Roman antiquity, Humanism, the Early Modern Period and modern poetry. They discuss how the pluralization of authorship changes the relation between authors and texts, how transdisciplinary factors such as media change, economic aspects, gender-specific expectations and cultural techniques influence the perception and reception of co-authorship, and how processes such as inspiration, consultation, discussion, encouragement and criticism contribute to the creation, development and completion of (art) works in co-authorship.