This book investigates the diverse world of wild oxen, sheep, and goats across all continents, encompassing both living and extinct species. Richard Lydekker, a noted naturalist and zoologist, draws upon extensive research and existing zoological knowledge to present a comprehensive overview of these bovids. The work likely details their physical characteristics, evolutionary history, geographical distribution, and ecological roles, providing a systematic classification and description of each group. It aims to serve as a definitive reference for understanding the taxonomy and natural history of these significant mammal families.

As a zoological reference work by a respected naturalist, this book is likely regarded as a valuable, albeit potentially dated, resource for understanding bovids. Its comprehensive scope suggests it would appeal to zoologists, naturalists, and serious amateur enthusiasts interested in mammalogy and wildlife. The detailed classification and descriptions would have served as a foundational text for its time, offering a systematic approach to the study of these animals. While modern research may have updated specific details, the work's historical significance and broad overview remain.