Gabriele Amorth was an Italian Roman Catholic priest and an exorcist of the Diocese of Rome who claimed to have performed tens of thousands of exorcisms. Amorth authored two books specifically on exorcism. The two books An Exorcist Tells His Story and An Exorcist: More Stories are not official Roman Catholic documents, rather personal accounts of his office as Exorcist. The books use witness accounts and personal experience as evidence. The two books include references to official Roman Catholic teachings on demonology, however the main emphasis is on Amorth's experience as an exorcist. Both include references to the diagnosis and treatment of spiritual problems. The books briefly cover the topics of demonic contraction and curses.