The Glorious Caliphate by S. Athar Husain presents a detailed historical and administrative study of the Khil¿fat-e-R¿shidah (11-40 A.H. / 632-661 A.D.), the formative era of Islamic governance following the passing of the Prophet Muhammad (peace and blessings be upon him). Drawing upon classical Islamic sources and historical accounts, the work examines the lives, policies, and reforms of the first four Caliphs-Ab¿ Bakr, ¿Umar, ¿Uthm¿n, and ¿Ali (may Allah be pleased with them). The book situates their leadership within the broader framework of Qur'¿nic guidance and Prophetic Sunnah, highlighting the ethical principles, legal foundations, and administrative structures that shaped the early Islamic polity. Part One narrates the life and achievements of each Caliph, tracing the transition from Prophetic mission to institutionalized governance. Part Two analyzes the administrative systems established under their rule, including civil administration, financial policy, judicial organization, military structure, and public works. Particular attention is given to the development of the Bayt al-M¿l (State Treasury), taxation policies (Zak¿t, Khar¿j, Jizyah), judicial appointments, advisory councils, and military regulations. The study demonstrates how ethical restraint, accountability before Allah, and commitment to justice remained central to early Islamic governance. Written in clear English and supported by references to classical authorities, this volume is suited for scholars, students of Islamic law and history, and institutional libraries seeking a structured presentation of the early Caliphate as a model of principled statecraft.