The Interpretation of Dreams (German: Die Traumdeutung) is an 1899 book by Sigmund Freud, in which the author introduces his theory of the unconscious with respect to dream interpretation, and discusses what would later become the theory of the Oedipus complex.

Delving into theories of manifest and latent dream content, the special language of dreams, dreams as wish fulfillments, the significance of childhood experiences, and much more, Freud offers an incisive and enduringly relevant examination of dream psychology. Encompassing dozens of case histories and detailed analyses of actual dreams, this landmark work grants us unique insight into our sleeping experiences.

Three Essays on the Theory of Sexuality, sometimes titled Three Contributions to the Theory of Sex, is a 1905 work by Sigmund Freud, the founder of psychoanalysis, in which the author advances his theory of sexuality, in particular its relation to childhood.

These three essays -- "The Sexual Aberrations," "Infantile Sexuality," and "The Transformations of Puberty" -- are among Sigmund Freud's most important works. Here, Freud outlines the core features of libido theory, his grand view of the psychology of sexuality: sexual perversion is a matter of human nature and "normal" sexual behavior only appears later in life, sexual urges begin in infancy, and these urges turn their attention outward as we mature through puberty.

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• Self-Help & CounsellingPsychologyPsychoanalysis

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