The new commentary in respect to the law of general terms and conditions of business represents, in a detailed and systematic manner, the material provisions of law on general terms and conditions of business integrated in the German Civil Code through the Obligations Modernisation Law of 2002 and the procedural provisions regulated in the Injunction Suit Law. The jurisdiction and literature are presented in an overview and critically analysed for this purpose. Direct factual changes such as the reach of control for the law of general terms and conditions of business on labour law or the consequences of the modernised law of obligations on the law of general terms and conditions of business are discussed in detail. The extensive alphabetical and systematic overviews as well as comprehensive index enable rapid access to the commentaries.