A lesser-known guide to the influence of demonic forces, The Great Exorcism is filled with spiritual and historical knowledge of the purging and expulsion of demons from the human soul.

This book contains the stories and methods employed by demon hunters and exorcists over the centuries, with several incidents of mass devilry and evil explained. Satanic influences are a recurring theme through history, and the author delves into historic accounts of purging various ills from afflicted persons and groups. Some conditions present as supernatural transformations, while others appear to be persistent spells of misfortune, anger, or crises of health.

While Arthur Crane is foremost a Christian believer, he does not shy from exploring different philosophical and spiritual traditions which have encountered and devised unique means of exorcism. The various devils and demons who manifest in religious texts of old share commonalities; what is related in Buddhist scrolls for example share much with the forces of devilry combatted by Christians in Europe. Through the author's eclectic approach, we gain a wide-ranging impression of exorcist traditions dating back to antiquity.