In the area of public international law, the Library collects duplicate sets of all material generated by the International Law Commission, the International Court of Justice, and its predecessor, the Permanent Court of International Justice. The Library also collects documentation of the Council of Europe, including decisions of the European Court of Human Rights. The Library has a sizeable collection of secondary materials, both periodical and monographic, dating back to the nineteenth century, as well as a large reference collection dedicated to public international law.
The Library collects the decisions of the European Court of Justice, as well as monographs and periodicals in the area of European Union law in support of the Indiana University-Bloomington European Union Center of Excellence. This collection also includes documentation of other important international and regional law-making bodies, such as the Council of Europe, and documentation of international bodies dedicated to the codification or unification of private law, such as Unidroit. The Library has extensive monographic, periodical, and looseleaf collections covering all areas of private international law, as well as specialized collections on various international law areas, such as the law of the sea.
The Library has large retrospective microform collections of documentation for several international organizations, including the United Nations, the World Trade Organization, and the European Union. For recent documentation the Library now relies on the official Web sites of those organizations.