Book excerpt: International Law in the U.S. Legal System provides a wide-ranging overview of how international law intersects with the domestic legal system of the United States, and points out various unresolved issues and areas of controversy. Curtis Bradley explains the structure of the U.S. legal system and the various separation of powers and federalism considerations implicated by this structure, especially as these considerations relate to the conduct of foreign affairs. Against this backdrop, he covers all of the principal forms of international law: treaties, executive agreements, decisions and orders of international institutions, customary international law, and jus cogens norms. He also explores a number of issues that are implicated by the intersection of U.S. law and international law, such as treaty withdrawal, foreign sovereign immunity, international human rights litigation, war powers, extradition, and extraterritoriality. This book highlights recent decisions and events relating to the topic, including various actions taken during the Trump administration, while also taking into account relevant historical materials, including materials relating to the U.S. Constitutional founding. Written by one of the most cited international law scholars in the United States, the book is a resource for lawyers, law students, legal scholars, and judges from around the world.