- Sefer Yeẓirah2
- Sefirot (Cabala)2
- Sermons, Italian2
- Service books (Music)--Catholic Church2
- Sharḥ al-Mawāqif (Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf)2
- Sharḥ al-ʻAqāʼid al-Nasafīyah (Taftāzānī, Masʻūd ibn ʻUmar)2
- Sharḥ al-ʻAqāʼid al-ʻAḍudīyah (Dawwānī, Muḥammad ibn Asʻad)2
- Sharḥ Īsāghūjī (Kātī, Ḥusām al-Dīn al-Ḥasan)2
- Shāfiyah (Ibn al-Ḥājib, ʻUthmān ibn ʻUmar)2
- Sonnets2
- Soul--Islam2
- Spain--Castilla y León2
- Spain--Madrid2
- Spanish poetry--Classical period2
- Sphaera mundi (Sacro Bosco, Joannes de)2
- Spirituality--Catholic Church2
- Statesmen2
- Sufi poetry, Persian2
- Sufi poetry, Turkish2
- Sundials2