Henley’s Twentieth Century Formulas, Recipes and Processes is a comprehensive compendium that meticulously catalogues a vast array of practical formulas across diverse disciplines, including chemistry, food production, and household management. The book is characterized by its straightforward and utilitarian prose, reflecting early 20th-century scientific thought and the burgeoning interest in domestic efficiency and industrial processes. In the tradition of earlier formulary texts, it serves not only as a technical reference but also as a cultural artifact that illustrates the period’s innovations and the practical application of science to everyday life. The compilation stems from the collaborative efforts of various contributors, each bringing specialized knowledge and experience to the table. As a product of the early 1900s, this work reflects the growing emphasis on scientific method and practical application during a time of significant technological advancement. The editorial nearness of Henley and his team’s effort mirrors an era when expertise was deemed essential for navigating a rapidly changing world, revealing their commitment to making complex formulas accessible to professionals and amateur experimenters alike. I highly recommend Henley’s Twentieth Century Formulas, Recipes and Processes to anyone interested in the intersection of science, history, and practical application. This invaluable resource not only arms its readers with time-tested formulas but also offers insights into the societal values and technological progress of its time, making it a must-have for historians, chemists, and culinary enthusiasts alike.