The fourth edition continues the goal of earlier editions: providing the most current and comprehensive treatment of the modern law of sales and leases in national and international transactions. The new edition includes important new cases to elaborate the continuing development of critical provisions of that law, and to elucidate new caselaw trends. The official withdrawal of proposed amendments to UCC Articles 2 and 2A provided room for these important cases without a significant increase in the size of the volume. While continuing to emphasize any significant differences between Articles 2 and 2A, the new edition eliminates separate coverage of Article 2A where its provisions replicate Article 2. At the same time, the important distinction between true leases and secured transactions disguised as leases not only continues but is emphasized in new case and text material. Among other current developments, the fourth edition recognizes the Supreme Court's important elaboration of the Federal Arbitration Act and it effect on the holdings and rationales of state courts in adjudicating claims of unconscionable arbitration agreements. The unique CISG coverage of prior editions has been updated, along with the text material throughout the volume, to provide the most current dimensions of sales law.