Principles of Legal Research provides comprehensive yet concise coverage of resources and research methods suitable for all researchers. It explains the latest features of the major legal research platforms as well as hundreds of other free and subscription online resources. An introductory survey of research strategies is followed by discussion of major secondary source types, thorough treatment of the sources of U.S. law created by each branch of government, chapters on specialized resources for practitioners, and an overview of international and foreign law. This wholly revised edition adds coverage of artificial intelligence and its use in legal research, and other features include summary introductions to the book’s parts, a reorganized case research chapter, and an expanded section on American Indian law. Legal citation tips and instructive illustrations are included throughout, and an appendix lists multivolume treatises by topic.


Imprint: West Academic Publishing
Series: Concise Hornbook Series
Publication Date: 07/08/2025

Kent C. Olson, University of Virginia School of Law

Aaron S. Kirschenfeld, University of North Carolina School of Law

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This edition of Principles of Legal Research:

  • Adds introductory text to each part of the book, with the goal of outlining, at a high level, why the concepts are treated as they are and why they are important to understand
  • Adds introductory strategy for use of generative AI in research (Chapter 1)
  • Clarifies discussion of non-periodical and periodical secondary sources (Chapters 2 & 3)
  • Provides the resources necessary to keep current with developments in executive power and federal administrative law (Chapters 7 & 8)
  • Expands coverage of American Indian law, including both federal Indian law and tribal law resources (Chapter 9)
  • Reorganizes case research material to better reflect current use of legal research platforms (Chapter 12)
  • Reorganizes factual information research chapter to better emphasize common, important tasks (Chapter 16)
  • Adds or replaces over 40 new, high-quality illustrations

Learn more about this series.