Freud wrote for an educated audience, but the field of psychology was too new for him to write specifically for professionals. Books like The Interpretation of Dreams and Beyond the Pleasure Principle are widely accessible to a modern audience, which is already somewhat familiar with Freudian notions through cultural osmosis. His later books, Civilization and Its Discontents and Moses and Monotheism, expand many of his earlier ideas into a discussion not just of human nature but of the nature of human civilization.

Major Works

The Interpretation of Dreams (1900)
Psychopathology of Everyday Life (1901)
The Joke and Its Relation to the Unconscious (1905)
Five Lectures on Psycho-Analysis (1910)
Totem and Taboo (1913)
The Complete Introductory Lectures on Psychoanalysis (1916-1917)
Beyond the Pleasure Principle (1920)
The Ego and the Id (1923)
An Autobiographical Study (1925)
The Future of an Illusion (1927)
Civilization and Its Discontents (1930)
Moses and Monotheism (1939)

Collected Letters

The Complete Correspondence of Sigmund Freud and Ernest Jones 1908-1939. Ed. R.
Andrew Paskauskas. Belknap Press (1993)

The Complete Letters of Sigmund Freud to Wilhelm Fliess 1887-1904. Ed. J.M.
Masson. Belknap Press (1985)

The Correspondence of Sigmund Freud and Sandor Ferenczi. Ed. Brabant, Falzeder
and Giampieri-Deutsch. Belknap Press (1993)

The Freud/Jung Letters. Ed. William McGuire. Princeton University Press (1974)

Letters of Sigmund Freud. Ed. Ernst L Freud. Dover publications (1992)
The Letters of Sigmund Freud and Arnold Zweig. Ed. Ernst L. Freud. Harcourt,
Brace (1970)

The Letters of Sigmund Freud to Eduard Silberstein, 1871-1881. Ed. Walter
Boelich. Belknap Press (1990)

Psychoanalysis and Faith: The Letters of Sigmund Freud and Oskar Pfister. Ed.
Heinrich Meng and Ernst L. Freud. Basic Books (1963)

Later Compilations

The Basic Writings of Sigmund Freud, Ed. A.A. Brill (1938)

The Standard Edition of the Complete Psychological Works of Sigmund Freud (24
volumes), Ed. James Strachey, Alix Strachey & Alan Tyson (1953-1974)

Sexuality and the Psychology of Love (collection of essays on sexuality from
1905-1938), Ed. Philip Rieff (1963)

On Creativity and the Unconscious; Papers on the Psychology of Art, Literature,
Love, Religion. Ed. Benjamin Nelson (1958)

Sigmund Freud: Character and Culture, Ed. Philip Rieff (1963)