The topic of this book is vital to the understanding of contemporary developments in Iran and other areas of the Islamic world in which Shi'ism is a significant social and religious force. Islamic tradition in general speaks about the appearance of the Mahdi, or divinely guided messianic leader, from among the descendants of the prophet. In Shi'ism, belief in the Mahdi is the foundation on which the entire spiritual and temporal edifice rests. Sachedina's...