This volume assembles written versions of lectures presented and discussed at the conference «Invention, Rewriting, Usurpation - Discursive Fights Over Religious Traditions In Antiquity» held at Aarhus and Ebeltoft in Denmark in the spring of 2010. Most of the religious texts studied in the contributions were drawn from Early Judaism and Early Christianity. The interest in these was on the one hand elucidating different aspects of the role they played in the formation and transformation of the religions, and on the other hand investigating the role these same texts played in cooperation and conflict between these two religions. The topics of the essays focus on four particular themes, namely Reuse, Rewriting and Usurpation of Biblical and Classical Texts, Invention and Maintenance of Religious Traditions, Orthodoxy and Heresy, and Formation of the Biblical Canon.