The book "Medico-legal studies: Psychopathy sexualis with special studies on sexual inversion" by Richard von Kraft-Ebing is a scientific and medical work that is devoted to the study of various aspects of human sexuality, in particular psychopathy, which includes deviations from sexual norms. The author investigates various forms of violations of sexual development, reveals the psychological and physiological aspects of these violations, and also considers them from a legal point of view. The book contains important analyzes and conclusions that became the basis for further research in the field of psychiatry and sexology. "Medico-legal studies" is an important resource for professionals and students interested in sexology and psychiatry.