The book of the outstanding figure in Russian psychiatry, Pyotr Borisovich Gannushkin (1875-1934), contains a number of never reprinted works that preceded and partly formed the basis for the main work of his life. This work. “Psychopathy Clinic” is also included in our collection. The innovation of this work is the principle of studying psychopathy not only in the static, but also in the dynamic form of the same psychopathic personality. Gannushkin’s works do not lose their relevance over the years and will be of interest not only to professionals, but also to everyone who is interested in human nature.