The Bürgerliches Gesetzbuch is the very backbone of German civil law. Its legal concepts and principles are essential for the understanding of the law of one of Europe’s major legal systems. In its first edition, this article-by-article commentary covers Books 1 to 3 of the German Civil Code: General Part, Law obligations, Law of Property. The commentary reflects the law on 31 December 2018 and includes translations of legislation until 31 December 2019. The commentary of each article features the current version of the article both in the German original and an English translation. The clear and uniform structure of each commentary allows for easy navigation through the complex legal concepts and challenging terminology. Through concise explanations, the abstract articles are brought to life and their meaning becomes accessible to lawyers, legislators, students, scholars, and translators.