This book, by a French Canadian physician, is a popular presentation of arguments and justification for instruction of young people with regard to the venereal diseases. It quotes religious authorities to substantiate the assertion that the maintenance of good health is a moral obligation. The author has evidently had in mind the need to make information available to comparatively simple and unsophisticated readers. Some of the principal facts with regard to syphilis and gonorrhea are given, and much attention is paid to the effects of syphilis in families and on children. The author strongly and repeatedly advocates premarital examinations. The book will probably be of considerable service to the type of reader whom the author had in mind.