The book "Climates of the Past" by the German geologist M. Schwartzbach, the translation of which is recommended to the reader, is one of the latest reports on paleoclimatology. Unlike most such works, focusing on the presentation of theories and hypotheses adopted in modern paleoclimatology, M. Schwartzbach's book, as the author himself points out, contains abundant factual material accumulated by geology and related sciences. The author gives an exposition of the theories and hypotheses of modern paleoclimatology only in connection with the available factual material, noting their weaknesses that are found in connection with the accumulated new data.