In “Sex-Education,” Maurice A. Bigelow presents a pioneering examination of sexual health and education in the early 20th century, blending scientific rigor with a progressive moral vision. The book is marked by its clear and accessible style, addressing complex topics such as biology, reproduction, and ethics while advocating for a rational approach to sexuality. Bigelow contextualizes sex education within the larger movements for social reform, emphasizing its critical importance in combating misinformation and fostering healthy attitudes towards sexuality among youth. His thorough use of both empirical evidence and narrative appeal positions the work as a seminal text in the field of sexual education. Maurice A. Bigelow, an influential educator and reformer, was deeply concerned with the moral and physical well-being of adolescents. His background in education and public health informed his belief that comprehensive sex education was essential in shaping informed and responsible citizens. Living during a time of significant cultural change, Bigelow recognized the urgent need to address issues of sexuality openly, challenging prevailing taboos that often left young people ill-equipped to navigate their sexual development. “Sex-Education” serves as a vital resource for educators, parents, and advocates of comprehensive sexual health, encouraging informed dialogue and respectful understanding. By engaging with this text, readers will appreciate not only its historical significance but also its enduring relevance in contemporary discussions surrounding sexual health education.