This unique course book provides a detailed focus on the use of international law in U.S. domestic legal processes. It discusses various forms of incorporation of international law into U.S. federal and state legal processes, questions of federal and state jurisdictional competencies regarding civil and criminal sanctions, hurdles concerning actual litigation and prosecution, extradition, and cooperation in both civil and criminal transnational law enforcement. It covers traditional topics such as the nature, sources, and evidences of international law; jurisdiction under international law; the law of the sea; and the use of armed force.