A series of letters discussing and debating basic Shīʿa and Sunnī beliefs between the late Shīʿa scholar Sayyid Sharaf al-Dīn, and the late Sunnī scholar and head of Al-Azhar university of that time, Shaykh Salīm al-Bishrī. The written form of the debates in book, has the advantage that the two parties had the opportunity to provide the best possible replies they could give. The book...