In this well-written and detailed monograph the author examines the problem of acculturation. He gives life histories and the conclusions from various psychological tests. All that he reveals is very valuable from the point of view of ethnography but for the psychoanalyst it only confirms what is well-known. Acculturation is due not so much to the intrinsic value of white culture as it is to the impulse to revolt in individuals who have had a traumatic childhood. The Navahos are, of course, very far from being 'primitive' or unneurotic. The author's remarks about the missionary as an obstacle to anthropological work are interesting.