In “Animal Locomotion; or, Walking, Swimming, and Flying,” James Bell Pettigrew presents a meticulous examination of the mechanisms of movement across different species. The book is characterized by its scientific rigor and rich descriptive prose, which captures the elegance of animal motion while grounding it in anatomical and physiological principles. Pettigrew delves into the intricate adaptations that allow various organisms to navigate their environments, offering comparative analyses that reflect the state of biological sciences in the late 19th century. His work resonates with the burgeoning interest in evolution and natural history, positioning it within a context of exploration during a transformative era in science. James Bell Pettigrew, a Scottish zoologist and anatomist, was profoundly influenced by the naturalistic studies of his time and the emerging theories of evolution. His extensive background in both zoology and physiology provided him with a unique lens through which to evaluate animal movement, drawing from personal observations and empirical studies. This combination of keen scientific inquiry and a deep appreciation for the natural world underlies Pettigrew's commitment to uncovering the principles governing locomotion. This work is indispensable for anyone interested in biomechanics, zoology, or the evolutionary adaptations of animals. Pettigrew's insightful analysis and engaging narrative make it a remarkable resource for scholars and enthusiasts alike, encouraging a deeper appreciation for the fascinating ways in which life moves and thrives in diverse habitats.