The Emergence of Ijtihad-based Jurisprudence and Its Stages — Muhammad Ali al-Sayis

نشأة الفقه الاجتهادي وأطواره — محمد علي السايس

Muhammad Ali al-Sayis's book in the Scientific Series of the Islamic Research Academy of al-Azhar. It traces ijtihad from the Prophet ﷺ's age through the Rashidun, Umayyad and Abbasid periods, then sets out the principles of the four Sunni schools and the post-ijtihad period; 116 pages, supervised by the Academy's Secretary-General.