On Narcissism is an essay by Sigmund Freud written in 1914. The essay concerns Freud's psychoanalytic theory of narcissism in relation to sexual development. Freud examines the distinction between "object-libido" and "ego-libido," and the concept of an ego ideal, which becomes the center of self-obsession and reflection. The essay is also considered a refutation of theories by Jung and Adler, attempting to demonstrate the validity of his own theory of narcissism over non-sexual libido or "masculine protest."
This is a good choice if you're looking for a quick read or refresher rather than an in-depth analysis. You'll get a brief book summary and chapter by chapter breakdown. The website loads quickly with minimal advertising.