Composed at the time of al-‘Aziz, Kitab Istitar al-imam wa tafarruq al-du’at fi’l-jaza’ir li-talabi-hi (The Book of the Concealment of the Imam and the Departure of the da‘is to different “islands” in search of him) relates important details on ‘Abd Allah al-Akbar and his successors down to ‘Abd Allah al-Mahdi, when he founded the Fatimid dynasty. The narrative refers to the hardship suffered by ‘Abd Allah al-Akbar and the quest for him by the da‘is who had lost touch with him.
Read more: The Institute of Ismaili Studies – Istitar al-imam.