John D. Caputo has a long career as one of the preeminent postmodern philosophers in America. The author of such books as Radical Hermeneutics, The Prayers and Tears of Jacques Derrida, and The Weakness of God, Caputo now reflects on his spiritual journey from a Catholic altar boy in 1950s Philadelphia to a philosopher after the death of God. Part spiritual autobiography, part homily on what he calls the nihilism of grace,...