**Demonology of Sacra; or, A Treatise on the Temptations of Satan in Three Parts** by Richard Gilpin is a classic work that examines the nature and methods of evil in the light of Christian theology. In this book, the author examines the temptations and the true nature of Satan, working with the texts of Scripture and his own experience. The psychology of temptations, the influence of demons on a person, as well as ways that can help cope with devilish temptations are analyzed in detail. Gilpin's book is an important resource for those interested in the spiritual life and the fight against dark power.