David Baggett is professor of philosophy at Liberty University in Lynchburg, Virginia. His books include C. S. Lewis as Philosopher: Truth, Goodness and Beauty; Did the Resurrection Happen?: A Conversation with Gary Habermas and Antony Flew; Tennis and Philosophy: What the Racket is All About; and Sherlock Holmes and Philosophy.
Jerry L. Walls recently served as a Research Fellow in The Center for Philosophy of Religion at Notre Dame, and is currently a visiting scholar there. Among his books are Hell: The Logic of Damnation, Heaven: The Logic of Eternal Joy, and Purgatory: The Logic of Total Transformation. He is also the editor of The Oxford Handbook of Eschatology.