Paul Draper is Professor of Philosophy at Purdue University, where he has taught since the fall of 2006. Prior to that, he taught for 19 years at Florida International University in Miami. He has also had three fellowships at the Center for Philosophy of Religion at the University of Notre Dame, including the Alvin Plantinga Fellowship in 2010-2011. Most of his published work is on the problem of evil and other topics in the philosophy of religion. J. L. Schellenberg is Professor of Philosophy at Mount Saint Vincent University and Adjunct Professor in the Faculty of Graduate Studies at Dalhousie University. He is the author of Divine Hiddenness and Human Reason and of a trilogy on the philosophy of religion: Prolegomena to a Philosophy of Religion, The Wisdom to Doubt: A Justification of Religious Skepticism, and The Will to Imagine: A Justification of Skeptical Religion. The ideas of the trilogy, and his earlier work on hiddenness, are made generally accessible in two recent short works from Oxford: Evolutionary Religion and The Hiddenness Argument: Philosophy's New Challenge to Belief in God.