| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Spiritual Leaders Who Changed the World: The Essential Handbook to the Past Century of Religion | 978-1-59473-241-6 (1-59473-241-8) | 2008 |
| Spiritual Perspectives on Globalization: Making Sense of Economic and Cultural Upheaval | 978-1-893361-57-7 (1-893361-57-8) | 2002 |