The book of the outstanding figure of Russian psychiatry Pyotr Borisovich Gannushkin (1875-1934) contains a number of never reprinted works that preceded and partly formed the basis of 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 psychopathies not only in the static, but also in the dynamic hypostasis of the same psychopathic personality. Over the years, Gannushkin's works do not lose their relevance and will be of interest not only to professionals, but also to everyone who is interested in human nature.