The Nicomachean Ethics is the name usually given to Aristotle’s best known work on «Ethics». The work, which plays a preeminent role in defining Aristotelian ethics, consists of ten books, originally separate scrolls, and is understood to be based on the notes of his lectures at the Lyceum. It is often assumed that the title refers to his son Nicomachus, to whom the work was dedicated or who may have edited it (although his young age makes this less likely). Another possibility is that the work was dedicated to his father, who was also named Nicomachus.