The Fourth Edition is designed to bring home to students the role of the law of sales, whether domestic or international, in resolving the most significant kinds of disputes that arise from commercial transactions today. This casebook provides detailed information on major U.S. commercial statutes and important international conventions that provide uniform law for the international sale of goods. The focus of these materials is on those issues in the law of sales that are most likely to give rise to controversy. Such issues arise when goods delivered by sellers are found by buyers to be unsatisfactory. The principal areas of concern are sellers obligations with respect to title and quality and buyers' legal remedies for sellers' failures. For the most part, these controversies become manifest after performance has been completed. Another set of issues concerns the parties' rights and duties when controversies arise in the course of performance, the choices that aggrieved parties can make, and the legal remedies that exist. The principal cases and notes have been carefully chosen to present those matters in contemporary context. Every chapter deals with the domestic law of the United States, principally UCC Article 2, and with international commercial law, principally the Convention on Contracts for the International Sale of Goods. The chapters are organized so that teachers can choose how much attention to give to international commercial law. In schools that schedule Contracts to be taught in two parts, these materials serve well as the basis for Contracts II.