Reidar Aasgaard born in Oslo (Norway) in 1955. After his theological studies he served as minister of the Lutheran Church for ten years. Professor at the Faculty of Theology in Oslo since 1993, has been dedicated to the study of the New Testament, early Christianity, apocryphal literature, and the reality of family and childhood in ancient times, and participated in the translation of the New Testament Norwegian. He is currently Professor of History of Ideas at the Faculty of Humanities at the University of Oslo. His research and teaching focus on intellectual history in antiquity and the Middle Ages.

Among his publications we can highlight My beloved brothers and sisters! Christian siblingship in Paul, London / New York 2004; Det nye testamentet - studieutgave, Oslo 2008; and The Childhood of Jesus: Decoding the Apocryphal Infancy Gospel of Thomas, Eugene (Oregon) 2009. He is also author of numerous articles in books and magazines.