"Jerry L. Walls is not a Catholic. He is professor of philosophy and religion at Asbury Theological Seminary, a conservative evangelical Methodist seminary in Wilmore, Kentucky. He teaches an annual C.S. Lewis seminar, which is one of the school's most popular offerings. Thirteen years ago he published a widely-discussed book entitled Hell: The Logic of Damnation (Notre Dame, IN: University of Notre Dame Press, 1992). Ten years later, he has published Heaven: The Logic of Eternal Joy (Oxford: Oxford University Press, 2002), which has also been receiving wide attention, among other things for his treatment of Purgatory."