| title | ISBN-13 (ISBN-10) | year of publica- tion |
|---|---|---|
| Sacred Land: Intuitive Gardening for Personal, Political and Environmental Change | 978-0-7387-1146-1 (0-7387-1146-2) | 2007 |
| Voices of the Earth: The Path of Green Spirituality | 978-0-7387-1465-3 (0-7387-1465-8) | 2009 |