This is a most timely book, highly relevant to current concerns about the relation of scientific and technological research to productivity and growth. It provides a very comprehensive analysis of the experience in agriculture, national and international, public and private. Focus, organization, management, funding, assessment, adaptation to change and a number of other basic issues are looked at trenchantly and thoughtfully. Professor Ruttan, who has been in government, foundations, experimental stations and universities, likes to deal with questions of principle in concrete terms. How far his shrewd observations and persuasive arguments provide guidance for research in manufacturing, mining, construction and services, it will be up to others to find out.