Al-Amidi's book on principles of law in two volumes finely bound hardcover edition with annotation by Dr. Yahya al-Tai. By Sayf al-Din Ali ibn Muhammad al-Amidi (551/1156 - 631/1233). Amidi was a major jurist of the Shafi'i madhhab and an Ash'ari theologian, (best know for Kitab al-Ihkam fi Usul al-Ahkam).