Sufis created the most extensive Muslim revivalist network in Asia before the twentieth century, generating a vibrant Persianate literary, intellectual, and spiritual culture while tying together a politically fractured world. In a pathbreaking work combining social history, religious studies, and anthropology, Waleed Ziad examines the development across Asia of Muslim revivalist networks from the eighteenth to the twentieth centuries. At the center of the story are the Naqshbandi-Mujaddidi Sufis, who inspired major reformist movements and articulated effective social responses to the fracturing of Muslim political power amid European colonialism. In a time of political upheaval, the Mujaddidis fused Persian, Arabic, Turkic, and Indic literary traditions, mystical virtuosity, popular religious practices, and urban scholasticism in a unified yet flexible expression of Islam. The Mujaddidi Hidden Caliphate, as it was known, brought cohesion to diverse Muslim communities from Delhi through Peshawar to the steppes of Central Asia. And the legacy of Mujaddidi Sufis continues to shape the Muslim world, as their institutional structures, pedagogies, and critiques have worked their way into leading social movements from Turkey to Indonesia, and among the Muslims of China. By shifting attention away from court politics, colonial actors, and the standard narrative of the Great Game, Ziad gives a new vision of Islamic sovereignty. At the same time, he demonstrates the pivotal place of the Afghan Empire in sustaining this vast inter-Asian web of scholastic and economic exchange. Based on extensive fieldwork across Afghanistan, Uzbekistan, and Pakistan at madrasas, Sufi monasteries, private libraries, and archives, Hidden Caliphate reveals the long-term influence of Mujaddidi reform and revival in the eastern Muslim world, bringing together seemingly disparate social, political, and intellectual currents from the Indian Ocean to Siberia. Review Hidden Caliphate announces the arrival of a major new scholar. By focusing on the more recent past of the eighteenth and nineteenth centuries, Ziad recenters the study of the Sufi tradition, which all too often has been relegated to the realm of metaphysics and poetry. He brings a contested period to light with encyclopedic insight. I heartily recommend this book. Omid Safi, author of The Politics of Knowledge in Premodern Islam: Negotiating Ideology and Religious Inquiry A major achievement. In this innovative, well-written book Ziad shows us a region knit together by the networks of the Naqshbandi-Mujaddidi Sufis. He is the first to set out their massive influence across Central Asia, Afghanistan, and northwest South Asia, and in the process reveals how limited was the understanding of the colonial powers in the Great Game. Francis Robinson, author of The Mughal Emperors: And the Islamic Dynasties of India, Iran and Central Asia, 1206-1925 Equipped with an impressive array of primary sources, Ziad skillfully dismantles restrictive notions of region and sovereignty and casts aside binaries such as that of Sufis and ulama. He then offers us a breathtaking view of a Persian cosmopolis held together by vibrant networks of Naqshbandi Sufis in the politically turbulent eighteenth century. This hugely important book should be read across a range of disciplines. Supriya Gandhi, author of The Emperor Who Never Was: Dara Shukoh in Mughal India A pioneering study of the Mujaddidi Sufi networks that spanned the eastern Islamic world, from Siberia to India, in the eighteenth and nineteenth centuries. Grounded in a prodigious range of sources, Hidden Caliphate shows how the orders doctrinal, ritual, and institutional dimensions offered intellectual and social cohesion for Muslims across this vast region before and after the advent of colonial domination. Devin DeWeese, author of Studies on Sufism in Central Asia Refreshingly original, Hidden Caliphat