To the layman interested in anthropology, this should prove an interesting and occasionally entertaining account of what is known and what is still unanswered concerning the origins of man in North and South America. It summarizes present knowledge on such questions as: ""From where did the first prehistoric Americans migrate?"" ""How long ago did they arrive?"" ""Where was their first point of contact with the American mainland?"" ""What was their original racial stock?"" ""Was their way of life basically one of agriculture or hunting?"" ""Did their culture originate here, or was it largely acquired through diffusion contacts with other people?"" The author, while not a professional anthropologist, quotes frequently from authorities, of whom there seem to be equal numbers on either side of most questions. The result provides the reader with some basic information, a considerable list of unanswered questions, and more importantly, some insight into the methods of anthropology and paleontology which often take on the aspects of detection. Interesting for the scientifically inclined -- along this particular bent.