- Secrets of the Universe: Scenes from the Journey Home (1992)
- Staying Put: Making a Home in a Restless World (1994)
- Writing from the Center (1997)
- Hunting for Hope: A Father's Journeys (1999)
- The Force of Spirit (2000)
- A Private History of Awe (2007)
- A Conservationist Manifesto (2009)
- Meeting Trees (2018)