Economics as a Coordination Problem: The Contributions of Friedrich A. Hayek — An Introduction dealing with Hayek's economics & putting it in the context of competing ideas. Published 1977.
Hayek: His Contribution to the Political and Economic Thought of Our Time — A truely brillant condension by Eamonn Butler of all the major themes of Hayek's career into a book accessable to the average person. Published 1983.
Hayek's The Constitution of Liberty - An Account of Its Argument — A concise account of the arguements in Hayek's major work of political philosophy, summarising and interpreting its argument for a non-specialist audience Published by the IEA, 2010.