Khaled Anatolios is John A. O'Brien Professor of Theology at the University of Notre Dame. He was born in India and grew up in Egypt and Canada. His other books include Retrieving Nicaea: The Development and Meaning of Trinitarian Doctrine.
Cornelius Plantinga is president emeritus of Calvin Theological Seminary and senior research fellow at the Calvin Institute of Christian Worship. His previous books include Beyond Doubt, Not the Way It's Supposed to Be, and Engaging God's World, and his many articles and essays have appeared in such periodicals as Books & Culture, Christianity Today, and The Christian Century.