The Universal Science (ʿIlm-i kullī) by Mahdī Ḥāʾirī Yazdī, is a concise, but authoritative, outline of the fundamental discussions in Islamic metaphysics. For many years used as a textbook in Iran, this short text offers English readers a readily accessible, lucid, and yet deeply learned, guide through the Sadrian, Avicennan, and Illuminationist schools of thought, whilst also demonstrating...