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23 Free Constitutional Law Books [PDF]

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Constitutional law books explain who holds power in a country, how far that power reaches, and which rights no government can take away. These free textbooks and casebooks help law students follow it from the first lecture to the hardest debates.

Start with the basics of separation of powers, federalism and judicial review, then move on to how the Supreme Court reads the U.S. Constitution. Other books cover the First Amendment, due process and constitutions from around the world.

Many of these titles are open access course texts written by law professors and judges. You can read every one online or download it for free.

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Constitutional Law Textbooks

Start here if you are new to constitutional law. These textbooks explain what a constitution is, how it organizes power and how courts keep it in check.

  • Constitutional Law with a Twist: Less Is More

    A streamlined casebook that covers the core of a first constitutional law course, from judicial review, federalism and separation of powers to due process, equal protection and fundamental rights. Short case excerpts and clear notes keep the focus on what you need to learn.

    Alisa Klein

    Format: PDF 360 pages 5.65 MB
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  • Constitutional Law I

    A full university course text on the foundations of constitutional law: the state, sovereignty, constitutionalism, the rule of law, types of constitutions and forms of government. It uses the Ethiopian constitution as a running case study.

    Sileshi Zeyohannes and Dagnachew Asrat

    Format: PDF 193 pages 1 MB
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  • Constitutional Law 1 (LAW 243)

    A self-study course module that explains the scope and sources of constitutional law, federalism, separation of powers, the rule of law and constitutional supremacy. It closes with the constitutional development of Nigeria from colonial rule to independence.

    National Open University of Nigeria

    Format: PDF 90 pages 1.27 MB
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  • What Is a Constitution? Principles and Concepts

    A clear primer on what constitutions do, what they usually contain and why they matter for democratic government. A good first read before tackling a full textbook.

    Elliot Bulmer

    Format: PDF 28 pages 0.5 MB
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  • The Rule of Law and the Constitution: A Short Overview

    A short lecture by a senior appellate judge on what the rule of law means and how it shapes constitutional interpretation, drawing on the Australian Constitution and leading common law thinkers.

    Andrew S. Bell

    Format: PDF 11 pages 0.14 MB
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American Constitutional Law Books

The U.S. Constitution is the oldest written national constitution still in force. These American constitutional law books trace how the Supreme Court gave its clauses meaning, from judicial review to national power.

  • The Essentials of American Constitutional Law

    A classic guide to the U.S. Constitution, clause by clause, with the leading Supreme Court decisions that gave each provision its meaning. It remains a clear introduction to how American constitutional law was built.

    Francis Newton Thorpe

    Format: PDF 243 pages 1.51 MB
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  • John Marshall and the Constitution

    The story of how Chief Justice John Marshall turned the Supreme Court into a powerful branch of government, from Marbury v. Madison and judicial review to McCulloch v. Maryland and national power.

    Edward S. Corwin

    Format: PDF 165 pages 0.95 MB
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  • An Economic Interpretation of the Constitution of the United States

    One of the most debated books in American constitutional history. Beard examines the economic interests of the framers and argues that they shaped the Constitution of 1787.

    Charles A. Beard

    Format: PDF 232 pages 1.86 MB
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  • Constitutional Law and International Humanitarian Law

    A teaching supplement for U.S. constitutional law courses on where the Constitution meets the law of war: treaties and the Supremacy Clause, the war powers of Congress and the President, and the courts.

    Sean Watts

    Format: PDF 21 pages 0.48 MB
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Constitutional Interpretation Books

Two judges can read the same clause and reach opposite answers. These books on constitutional interpretation explain the methods behind each reading, from text and original meaning to precedent.

  • Modes of Constitutional Interpretation

    A concise report on the main methods the Supreme Court uses to read the Constitution, including textualism, original meaning, precedent and pragmatism, with the cases that illustrate each one and the arguments for and against.

    Brandon J. Murrill

    Format: PDF 29 pages 0.74 MB
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  • An Introduction to Constitutional Interpretation

    A law school introduction to the competing approaches to constitutional interpretation, from text and original intent to structure and evolving values, written to help students follow the debates in the case law.

    Gerard J. Clark

    Format: PDF 33 pages 0.43 MB
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  • What Is Constitutional Interpretation?

    A theoretical essay arguing that constitutions should not be read like ordinary statutes, and that constitutional meaning depends on the principles of liberal democratic constitutionalism.

    Gonçalo de Almeida Ribeiro

    Format: PDF 33 pages 0.26 MB
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  • The Scope of Judicial Law-Making in Constitutional Law and Public Law

    A senior judge examines how far courts should go in shaping constitutional and public law, tracing the growth of judicial power and the limits that keep it in check.

    Lord Hodge

    Format: PDF 34 pages 0.39 MB
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Constitutional Rights Books

Free speech, equal protection and due process all come from constitutional law. These casebooks walk you through the landmark cases behind each right, with a full volume on the First Amendment.

Comparative Constitutional Law Books

How are new constitutions written, and why do countries borrow ideas from each other? These comparative constitutional law books look at constitutional systems from Britain to the rest of the world.

Each of these constitutional law books looks at the same question from a different side: how a constitution limits power and protects people.

Want to go deeper? Browse our full collection of free law books, or start with our Introduction to Law books.

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