1957. Second Impression. 174 pages. This is an ex-Library book. Dust jacket in clear protective sleeve over yellow cloth. Ex-Library copy, with expected inserts, stamps and inscriptions. Translated by J. B. Leishman. Pages remain bright and clear with minimal tanning and foxing. Binding remains firm. English and German texts in parallel. Boards have noticeable edge wear with corner bumping and rubbing to surfaces. Unclipped dust jacket. Panels to dust jacket have light edge wear with tears and creasing.