'Alī, son of Abī Ṭālib, Muhammad's son-in-law and cousin, is the only Companion of the Prophet who has remained to this day the object of fervent devotion of hundreds of millions of followers in the lands of Islam, especially in the East. Based on a detailed analysis of several categories of sources, this book demonstrates that Shi'ism is the religion of the Imam, of the Master of Wisdom, just like Christianity is that of Christ,...