The modern world struggles to make sense of the savage violence and terror perpetrated by Islamic State. In this timely publication Dr Patrick Sookhdeo analyses its ideology, theology, eschatology and strategy and scrutinizes key IS publications explaining the motivating beliefs of the leadership. He exposes the cruel nature of life under IS rule. He argues that it cannot be defeated by military means but must be delegitimised by the encouragement of reform movements within the Muslim community.