Correctly arguing that the integration of the socialist economies of Eastern Europe cannot follow the paths of the European Community, this Hungarian economist sees a "synchronized development policy" as the only reasonable objective. While sounding positive, he shows how difficult that approach is. He puts more emphasis than most observers would on solidarity within the group and the commitment to narrow the gap between the least and most productive economies. Facts, says Mr. Kozma, must guide policy, not general ideas about integration, and he makes detailed recommendations for Hungary. This densely written book is for specialists but has some interesting material on patterns of production and trade among the socialist countries and some unusual lines of argument.