The modern European languages contain more commentaries on the Nicomachean Ethics than on any work of Aristotle. Moreover, readers of English are the best provided for of all; we have four full commentaries, those of Grant, Stewart, Burnet, and Joachim, as well as commentaries on the fifth book by Jackson and on the sixth by Greenwood. In addition, several good books furnish the English reader with extensive and detailed accounts of the contents of the Ethics and evaluations of its leading ideas. The recent appearance of W.F.R. Hardie's comprehensive and careful study, Aristotle's Ethical Theory (1968), has significanly increased this literature. When one adds the comparable, though rather less profuse, materials in French and German one plainly has a formidable array of resources for the study of the Ethics.