This is the collected works of James M. Buchanan which is a wide range of works include different aspect of economics and political science.
Vol. 2. Public Principles of Public Debt: A Defense and Restatement Vol. 3. The Calculus of Consent: Logical Foundations of Constitutional Democracy Vol. 4. Public Finance in Democratic Process: Fiscal Institutions and Individual Choice Vol. 5. The Demand and Supply of Public Goods
Vol. 6. Cost and Choice: An Inquiry in Economic Theory
Vol. 7. The Limits of Liberty: Between Anarchy and Leviathan
Vol. 8. Democracy in Deficit: The Political Legacy of Lord Keynes Vol. 9. The Power to Tax: Analytical Foundations of a Fiscal Constitution Vol. 10. The Reason of Rules: Constitutional Political Economy