Thomas Jay Oord is professor of theology and philosophy at Northwest Nazarene University in Nampa, Idaho, and works with the Institute for Research on Unlimited Love. He wrote Science of Love: The Wisdom of Well-Being (Templeton Press, 2004).

Bernard Daley Zaleha is president of the Fund for Christian Ecology, a Boise, Idaho-based nonprofit that encourages discussion of religion’s responsibility toward the earth.

The American Ghost Society is a national network of ghost hunters, authors, ghost enthusiasts and psychical researchers who conduct investigations into the paranormal. They maintain a list of members and ghost hunters by state.

The Pluralism Project at Harvard University offers a state-by-state search engine for religious communities.