Callum Cooper, PhD, is a lecturer in psychology at the University of Northampton in the United Kingdom. He is author of Telephone Calls From the Dead. He is coeditor, with Steven Parsons, of Paracoustics: Sound and the Paranormal. And, he is coauthor (with Alex Tanous) of Conversations With Ghosts. His website is www.callumecooper.com.

Elizabeth Krohn is first author (with Professor Jeffrey Kripal) of Changed in a Flash: One Woman’s Near-Death Experience and Why a Scholar Thinks It Empowers Us All.