2020 marked the 40th anniversary of the CISG which now has over 90 Contracting States, with Hong Kong formally adopted the Convention in 2022, and further States are currently considering their accession to the Convention. Even more importantly, significantly more international case law applying the CISG has become available since the last edition in 2016. This timely new edition considers these new cases and other important developments and literature, continuing to provide the meticulous detail and authority of analysis of previous editions. Some of the article-by-article chapters have been completely rewritten. The fifth edition furthermore includes two new thematic chapters enabling coverage of topical subjects in a holistic way with reference to the various CISG articles they concern.