This volume contains the first critical edition of the Summa Alexandrinorum, that is the medieval Latin translation made in 1243 by Hermann the German of an Arabic abridgment of the Nicomachean Ethics known as the Iḫtiá¹£Är al-IskandarÄnÄ«yÄ«n. It is accompanied by a French translation. The volume also contains a full study of the manuscript tradition of the Latin text and sets out the principles used in the edition, which takes account, where necessary, of the Arabic version of the text, which has survived in the form of fragments. A study of the origin of the Summa Alexandrinorum and the relations between the Summa and the fragments and testimonies which are extant in other traditions and different languages completes the volume.