P. Nath's "Physical Anthropology" is a comprehensive textbook that covers various aspects of human evolution, genetics, and biology. The book provides an in-depth analysis of the physical characteristics of humans and their ancestors, including fossil records, primate behavior, and human variation.

Physical anthropology is the study of human evolution, genetics, and biology, focusing on the physical characteristics of humans and their ancestors. P. Nath is a renowned author in the field of physical anthropology, and his book is widely used by students and researchers.