- Isbījābī, Aḥmad ibn Manṣūr, -approximately 1087. Sharḥ al-Mukhtaṣar fī al-fiqh1
- Isfarāyīnī, Muḥammad ibn Muḥammad, -1285. Ḍawʼ al-Miṣbāḥ5
- Isfarāyīnī, Muḥammad ibn Muḥammad, d. 1285. Lubb al-albāb fī ʻilm al-iʻrāb3
- Isfarāyīnī, Muḥammad ibn Muḥammad, d. 1285. Lubāb al-iʻrāb2
- Isfarāyīnī, Muḥammad ibn Muḥammad, d. 1285. Ḍawʼ ʻalá al-Miṣbāḥ4
- Ishrāqīyah3
- Ishārāt wa-al-tanbīhāt (Avicenna)12
- Iskandarnāmah (Niẓāmī Ganjavī)2
- Islam292
- Islam and culture1
- Islam and justice1
- Islam and philosophy4
- Islam and politics9
- Islam and state2
- Islam--Apologetic works2
- Islam--Charities1
- Islam--Customs and practices138
- Islam--Doctrines445
- Islam--Functionaries2
- Islam--Miscellanea--Early works to 18002