The Austrian neurologist Sigmund Freud was the founder of psychoanalysis, a clinical method for treating psychopathology through dialogue between patient and psychoanalyst. Freud developed therapeutic techniques including the use of free association and transference, establishing its central role in the analytic process. Freud’s redefinition of sexuality led him to formulate the Oedipus complex as the central tenet of psychoanalytical theory. His analysis of dreams as wish-fulfilments also provided him with models for the clinical analysis of symptom formation and the underlying mechanisms of repression. This comprehensive collection within a single digital book presents Freud’s collected works, with numerous illustrations, rare texts, informative introductions and other material.