- Imamate1
- Islamic Empire1
- Islamic law--Interpretation and construction1
- Islamic sects1
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-14131
- Jīlī, ʻAbd al-Karīm ibn Ibrāhīm, 1365 or 1366- Insān al-kāmil fī maʻrifat al-awākhir wa-al-awāʼil1
- Kaʻb al-Aḥbār, -655 or 6561
- Kemalpaşazade, 1468 or 1469-1534. Risālah fī al-haykal al-insānī1
- Khalwatīyah1
- Khamrīyah (Ibn al-Fāriḍ, ʻUmar ibn ʻAlī)1
- Khūjahʹzādah, ʻAbd al-Naṣīr ibn ʻAbd Allāh, active 16th century. Taḥrīrāt ʻalá al-Ṭarīqah al-Muḥammadīyah1
- Knowledge, Theory of (Islam)1
- Kumayl ibn Ziyād, 633 or 634-7011
- Language and languages--Style1
- Legacies (Islamic law)1
- Logic1
- Manuscripts, Persian1
- Manuscripts, Urdu1
- Mas̲navī (Jalāl al-Dīn Rūmī, Maulana)1
- Miscellanea1