The book presents major fields of ecumenical debate of our day and draws key conclusions for the difficult questions of how to do ecumenical theology. Exploring dialogues between the Lutheran Church and the Anglican Communion (featuring the office of oversight), the Roman Catholic Church (debate on faith and reason), Baptists and Mennonites (baptism), and the Orthodox tradition (deification and righteousness), Hailer draws conclusions on how to do ecumenical theology. The author focuses on the concept of mutual gift exchange as key metaphor. An analytical overview of that kind does not yet exist nor do the conclusions concerning ecumenical hermeneutics provided by the final chapter.