Ibn Taymiyyah's treatise provides a very clear, concise and authentic view of this intriguing subject based on the Qur'an, the Sunnah, the interpretation and experience of the Sahabah (companions of the prophet and the early scholars of Islam). The Translator has also added an appendix consisting of a recent article written on the subject of spirit-possession and exorcism by one of the leading scholars of Saudi Arabia confirming Ibn Taymiyyah's views as both relevant and orthodox.