Although Hizb ut-Tahrir regularly holds conferences attended by tens of thousands of people, little is known about the organisation beyond the West's generalities and conjecture. Its members are repeatedly arrested in Russia, Central Asia, Turkey and across the Middle East, and since the Arab uprisings it has emerged as an influential political actor in Tunisia, has a growing profile in Egypt, and is making a visible impact in the Syrian revolution. This book uncovers the history of the global Islamic political party, based upon a diverse array of archival research, internal documents and other resources.