The main purpose of Mr. Green's book is summed up by himself as follows: 'to present as clearly and as simply as possible, such parts of the psychanalytic theory as were likely to be of use to parents and teachers, and to other people who were connected with and interested in children'. This aim he has certainly achieved in large measure, and has produced in addition a very readable and well-constructed book. One of its best features is the wealth of illustrations which accompany each different theme under discussion—illustrations always drawn from the author's own experience in his school and class room work or from contact with children outside the school—which give the reader