Gordon T. Smith (PhD, Loyola School of Theology, Ateneo de Manila University) is the president of Ambrose University and Seminary in Calgary, Alberta, where he also serves as professor of systematic and spiritual theology. He is an ordained minister with the Christian and Missionary Alliance and a teaching fellow at Regent College, Vancouver, British Columbia. He is the author of many books, including Courage and Calling, Called to Be Saints, Spiritual Direction, and The Voice of Jesus.
Roger E. Olson (PhD, Rice University) is professor of theology at George W. Truett Theological Seminary of Baylor University in Waco, Texas. He is the author of The Story of Christian Theology: Twenty Centuries of Tradition & Reform, The Mosaic of Christian Belief: Twenty Centuries of Unity & Diversityand The Westminster Handbook to Evangelical Theology. He is also coauthor of 20th-Century Theology: God & the World in a Transitional Age and Who Needs Theology? An Invitation to the Study of God (both with Stanley J. Grenz), and of The Trinity (with Christopher A. Hall).
Veli-Matti Karkkainen is professor of systematic theology at Fuller Theological Seminary in Pasadena, California. He has published numerous articles in international journals of theology. His books include Pneumatology (Baker), Christology (Baker), Toward a Pneumatological Theology (UPA), An Introduction to Ecclesiology (InterVarsity Press), Trinity and Religious Pluralism (Ashgate), The Doctrine of God (Baker) and One with God (Liturgical Press).