A few years ago I read "To Anger the Devil" by Marc Alexander. It is a fascinating non fiction book detailing the work of exorcist Reverend Dr. Donald Omand. For me the most interesting case was about a man who had the power to displace souls with another person. Apparently he developed the technique by studying "An Exchange of Souls" by Barry Pain: a novel published in 1911. It is now out of print and very difficult to find. I am trying to locate this book for research purposes so if you have a copy yourself or know someone who has, I would very much appreciate you letting me know. Or perhaps you have other related information: also much appreciated.
I received this update regarding the "Exchange of Souls"