Dr. Katherine Ramsland has published more than 1,000 articles and 45 books, including "The Forensic Psychology of Criminal Minds", "The Ivy League Killer", "Psychopath", "The Human Predator", "Inside the Minds of Serial Killers", and "The Mind of a Murderer". She holds graduate degrees in forensic psychology, clinical psychology, criminal justice, and philosophy, and teaches forensic psychology and criminal justice at DeSales University in Pennsylvania. Ramsland has worked with prominent criminalists, coroners, detectives, and F.B.I. profilers. She speaks internationally about forensic psychology and serial murder, and has appeared on numerous documentaries, as well as The Today Show, 20/20, 48 Hours, Larry King Live and E! True Hollywood Story.
She also writes a blog, Shadow Boxing, for Psychology Today.
Mark Nesbitt was a National Park Service Ranger/Historian for five years at Gettysburg before starting his own research and writing company. Since then he has published over fifteen books, including "Civil War Ghost Trails", "The Ghost Hunters Field Guide: Gettysburg & Beyond", and the national award-winning "Ghosts of Gettysburg" series. His stories have been seen on The History Channel, A&E, The Discovery Channel, The Travel Channel, Unsolved Mysteries, and numerous regional television shows and heard on Coast to Coast AM, and regional radio. In 1994, he created the commercially successful Ghosts of Gettysburg Candlelight Walking Tours, and in 2006, the Ghosts of Fredericksburg Tours.