Decisions of international courts and arbitrators, as well as judgments of national courts, are fundamental elements of modern public international law. The International Law Reports is the only publication in the world wholly devoted to the regular and systematic reporting in English of such decisions. It is therefore an absolutely essential work of reference. Volume 190 is devoted to the 2016 Judgment on preliminary objections and the 2017 Order on counter-claims of the International Court of Justice in Nicaragua v. Colombia, Maritime Delimitation in the Caribbean Sea and the Pacific Ocean and Land Boundary in the Northern Part of Isla Portillos (Costa Rica v. Nicaragua), the 2019 Final arbitral award on reparations in The Duzgit Integrity (Republic of Malta v. Sao Tome and Principe), and the 2019 Judgment of the English High Court in Heiser's Estate and Others v Islamic Republic of Iran.