Dr. Marcondes and his co-workers have turned out, for so short a book, a remarkably comprehensive account of the main thoughts and problems in the mental hygiene of the child. In very simple language they give a brief survey of the development of the individual, describe the functions of the various persons who work in mental hygiene clinics, and outline the main problems of the home and the school. Much of the work that goes on in São Paulo is influenced by North American authors, and the authors do not fail to give psychoanalysis its fair share of credit.