The book "Familiar Letters on Chemistry and Its Relation to Commerce, Physiology and Agriculture" was written by the eminent chemist Justus von Liebig. In this work, the author considers the relationship of chemistry with trade, physiology and agriculture, and also highlights important aspects of the influence of chemical processes on various spheres of human life. The author focuses on how the interaction of chemicals affects production, health, and agricultural practices, making this book a must-have for understanding the enormous importance of chemistry in today's world.