On the basis of a fairly detailed study, which includes a good deal of useful information, Dr. Hahn concludes that the Schuman Plan will not have a marked effect on the cost of producing steel in Western Germany or France in the near future. For the common market to work successfully, he argues, economic integration will have to be extended to other fields. The book also contains a reasoned restatement of many of the main German criticisms of the coal and steel treaty.