- Of God and Pelicans: A Theology of Reverence for Life (1989)
- With Roots and Wings: Christianity in an Age of Ecology and Dialogue (1995)
- Living from the Center (2000)
- Gandhi’s Hope: Learning from Other Religions as a Path to Peace (2005)
- Earth, Sky, Gods and Mortals: Developing an Ecological Spirituality (2009)
- Replanting Ourselves in Beauty: Toward an Ecological Civilization (2015) with Patricia Adams Farmer