Brother Earth: Nature, God, and Ecology in a Time of Crisis (1970).
The Travail of Nature: the Ambiguous Ecological Promise of Christian Theology (1985)
Nature Reborn: the Ecological and Cosmic Promise of Christian Theology (2000)
Ritualizing Nature: Renewing Christian Liturgy in a Time of Crisis (2008)
Before Nature: A Christian Spirituality (2014)
Behold the Lilies: Jesus and the Contemplation of Nature (2017)