Thirty years after its approval, the United Nations Convention on Contracts for the International Sale of Goods - the CISG - has become the law of international sales. In the meantime, 76 States have ratified the CISG, which make up for more than two thirds of the global trade. Despite the CISG's practical importance and its global reach, commentary literature on the CISG in English (the language of international trade) is rather limited. This book fills the gap and supplements the few existing commentaries, taking into account the various legal settings in which the CISG is applied. The commentary is designed as a German type of commentary, which provides an authoritative "article-by-article" comment to the CISG. It strictly follows the structure of the provisions of the Convention. Specific topics (e.g. E-Commerce and the CISG, the Unidroit Principles of International Commercial Contracts, the European Principles of Contract Law, and the Draft Common Frame of Reference) are dealt with in the context of the comments of the pertinent articles. The Incoterms are also discussed in detail. The comprehensive analysis will be of interest to scholars, practitioners, and legal advisors of international sales transactions.