Mohamed Al-Nasser Seddiki's profound scholarly work, 'The Idea of the Redeemer: A Study in Mahdist Thought,' delves into one of the most significant and complex concepts within Islamic eschatology: the belief in the Mahdi. This comprehensive research meticulously explores the origins, historical development, and diverse interpretations of Mahdist thought across various Islamic traditions. Seddiki provides an in-depth analysis of the theological, philosophical, and social dimensions surrounding the awaited redeemer figure, offering critical insights into how this idea has shaped religious discourse and societal expectations throughout Islamic history. The book serves as an essential resource for anyone seeking a deeper understanding of this pivotal doctrine and its multifaceted implications.