The Psychology of Love by Sigmund Freud
This volume brings together Freud's main contributions to the psychology of love. His illuminating discussions of the ways in which sexuality is always psychosexuality - that there is no sexuality without fantasy, conscious or unconscious - have changed the ways we think about erotic life. In these papers Freud develops his now famous theories about the sexuality of childhood and the transgressive nature of human desire.
In the famous case study of the eighteen-year-old 'Dora', we see Freud at work, both putting into practice and testing his sexual theories that were to change the modern world.