Sigmund Freud 
A General Introduction to Psychoanalysis [EPUB ebook] 

Freud’s Major Theories have given the world a new conception of both infancy and adolescence, and shed much new light upon characterology; given us a new and clearer view of sleep, dreams, reveries, and revealed hitherto unknown mental mechanisms common to normal and pathological states and processes; taught us to recognize morbid symptoms, often neurotic and psychotic in their germ; revealed the operations of the primitive mind so overlaid and repressed that we had almost lost sight of them; fashioned and used the key of symbolism to unlock many mysticisms of the past; and in addition to all this, affected thousands of cures, established a new prophylaxis, and suggested new tests for character, disposition, and ability, in all combining the practical and theoretic to a degree salutary as it is rare.
These twenty-eight lectures are elementary. They are divided in 3 parts :
-THE PSYCHOLOGY OF ERRORS
-THE DREAM
-GENERAL THEORY OF THE NEUROSES