Jose C. Nieto is a professor  emeritus of religion and history at Juniata College in Huntingdon, Pa. He is an expert on mysticism and wrote the book Religious Experience and Mysticism: Otherness as Experience of Transcendence (University Press of America, 1997).

Yvonne Chireau is an professor of religion at Swarthmore College in Pennsylvania and the author of numerous books and articles on the supernatural and African-American religion, including Black Magic: Religion and the African American Conjuring Tradition (University of California Press, 2003).

Bill Ellis is  Professor Emeritus of English and American studies at Pennsylvania State University, Hazleton. He is the author of Aliens, Ghosts and Cults: Legends We Live (University Press of Mississippi, 2001).

Laura Donaldson is an associate professor of English at Cornell University in Ithaca, N.Y. She has written about women’s beliefs in the New Age movement, which includes belief in many supernatural and paranormal phenomena.

David Roozen, professor of religion and society and director of the Hartford Seminary Institute For Religion Research, has written about religious television. He specializes in national religious trends.

Jason Hawes is founder of the Atlantic Paranormal Society, which investigates paranormal phenomena, including ghosts, in the north Atlantic states. He is also a star and producer of the Syfy show Ghost Hunters. Contact Jason here or via Facebook.

Michael Brown is a professor of anthropology and Latin American studies at Williams College in Williamstown, Mass. He has written about belief in magic and in channeling.

Eugene Gallagher is a professor of religious studies at Connecticut College in New London. He has written about belief in sorcery and new religious movements. He is the co-author of Why Waco.

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.