Most Popular Books
- The Ecotheology of Paul Tillich: The Spiritual Roots of Environmental Ethics
- Faithful to Nature: Paul Tillich and the Spiritual Roots of Environmental Ethics
- Suffering, Empathy, and Ecstasy: Animal Liberation as the Furthest Reaches of Our Moral Evolution
- Love, Gravity, and God: Paul Tillich and the Existential Depths of Reason and Religion
- Underground Haiku: Notes from Below
