This casebook is the first to focus on the interaction of the U.S. legal system with Mexican law in the border region. The work presents American court decisions supplemented with the author's commentary and study questions. As the U.S.-Mexico border has generated a wide array of controversies, the casebook covers boundary questions, border detentions, immigrants' rights, family law, real estate transactions, finance and trade, torts, crimes, environmental law, and Mexican law within the United States. It will teach law students in law, public policy, and undergraduate courses about the power and limitations of law in resolving border-related disputes.