Noah Feldman referencing Dr. J :)

On the classical Islamic constitution and the place of law in it, see Sherman A. Jackson, Islamic Law and the State: The Constitutional Jurisprudence of Shihab al-Din al-Qarafi (Leiden: E. J. Brill, 1996). This work remains one of the only recent texts addressing the interrelationship between classical Islamic law and the classical Islamic constitutional order. For Jackson's review of the most important older Orientalist work on Islamic constitutional thought, including important works by Gibb, Coulson, Watt, Lambton, and Rosenthal, see xxxv-xl.

-The Fall and Rise of the Islamic State (Council on Foreign Relations) by Noah Feldman, footnote # 6 on pg. 158.

:)