Founding the Fatimid state the rise of an early Islamic empire : an annotated English translation of al-Qāḍī al-Nuʻmān's Iftitāḥ al-Daʻwa - Nuʻmān ibn Muḥammad, Abū Ḥanīfah, d. 974 (Ismaili texts and translations series (Institute of Ismaili Studies) ;, 2006)