Bishop Terry Wiles is leader of Crossroads Community Cathedral in East Hartford, Conn. The church lists a literal belief in the Rapture as central to its members’ faith and membership.

Philip Lamy is professor of sociology and anthropology at Castleton State College in Castleton, Vt. He is an expert on secular millennial movements, including among survivalist groups and militias.

John J. Collins is a professor of Old Testament interpretation and criticism at Yale Divinity School in New Haven, Conn. He is an expert on Jewish apocalypticism.

Daniel Wojcik is a professor of folklore studies at the University of Oregon. He is interested in contemporary American apocalyptic movements and groups, especially those focused on UFOs.

Sharan Newman is the author of The Real History of the End of the World: Apocalyptic Predictions From Revelation and Nostradamus to Y2K and 2012.

Marty Richards, a geriatric social worker in Port Townsend, Wash., who teaches at the University of Washington School of Social Work, has worked with patients, families and institutions to develop appropriate and meaningful forms of spiritual expression for people with dementia.

Clinical psychologist Cordula Dick-Muehlke works for the University of California’s Institute for Memory Impairments and Neurological Disorders and has more than 20 years’ experience in the field. She lectures widely on spirituality, elder care and dementia.

Pamala Kennedy is co-author with her husband, Richard, of Suffering in Slow Motion: Help for A Long Journey Through Dementia and Other Terminal Illnesses (Regal Books, 2003). Richard, pastor of a nondenominational church, was diagnosed with fronto-temporal dementia in 1997.

Deborah Shouse is the Kansas City area author of the 2006 book Love in the Land of Dementia: Finding Hope in the Caregiver’s Journey. Shouse’s mother had Alzheimer’s. Shouse and Ron Zoglin are The Creativity Connection‘s motivational consultants.