Averroes' Middle Commentary on Aristotle's Metaphysics reveals the original version, previously considered lost, of a landmark work in Arabic philosophy. Undoubtedly authored by the Cordovan thinker Averroes (1126-1198), this "middle" commentary is distinct from the Long Commentary and the Short Commentary in method, several doctrinal elements, and scope (it includes books M and N of the Stagirite's treatise). These points and the transmission of the Middle Commentary at the crossroads of Arabic, Hebrew, and Latin traditions are addressed in the introduction, which also establishes that the work was extensively quoted by the mystical philosopher Ibn Sab?in (13th c.). The edition of the text and the facing translation follow. At the end of the book are Ibn Sab?in's quotations, along with extensive indexes.