Shams al-Ma'arif al-Kubra (The Sun of Knowledge, the Greater) is a medieval Arabic grimoire attributed to Ahmad al-Buni (d. c. 1225–1226). It’s a foundational text in the Western Islamic occult tradition, covering talismans, astrology, numerology (abjad), mystical letters and names of God, and methods for invoking spiritual influences. The work blends neoplatonic and Islamic esoteric ideas with practical ritual techniques; historically it circulated in manuscript form and later printed editions, and has been influential (and controversial) across North Africa, the Middle East, and beyond.