Inside the immaculate portal : a history from early Fatimid archives : a new edition and English translation of Manṣūr al-ʻAzīzī al-Jawdharī's biography of al-Ustādh Jawdhar, the Sīrat al-Ustādh Jawdhar - Manṣūr, al-Kātib, -approximately 1000 (I.B. Tauris in association with the Institute of Ismaili Studies, 2012)