Regarded as a classic study of demonic possession and exorcism, this sobering work confronts the reality of Satan without sensationalism or denial. Through documented cases from around the world, it distinguishes possession from obsession and psychological illness and exposes the dangers of occult practices and cultural influences that open doors to evil. Readers will learn the signs of spiritual attack, the Church’s response through exorcism, and the powerful authority of Christ over the forces of darkness. At a time of widespread confusion, this book calls believers to vigilance, faith, and confidence in the victory of Our Lord.