Aristotle’s teaching on the subject of happiness has been a topic of intense philosophical debate in recent years; it is of vital importance to the question of the relevance of his ethics in the present day. Aristotle’s admirers struggle to read a comprehensive account of the supreme happiness into the Nicomachean Ethics; Kenny argues that those who are prepared to take the neglected Eudemian Ethics seriously preserve their admiration intact without doing violence to any of the relevant texts of the Nicomachean Ethics. Kenny has refined his position on the relation between the two works, offering a fresh examination and interpretation of the Eudemian Ethics on the basis of the 1991 Oxford Classical Text. He combines scholarly discussion of the Greek texts with reflection of the topics covered by Aristotle, taking account of post-Aristotelian treatments of themes such as moral vocation and moral luck.