uropean Sales Law: Challenges in the 21st Century contains more than two decades of EU sales law history. In the early 2010s, a full-fledged (optional) EU Sales Law Code was on the agenda. However, this endeavour failed. In 2019 two directives took up the central ideas the 2019/770 Digital Content Directive and the 2019/771 Sale of Goods Directive. The digital content part attracted considerably more attention while the sales part was arguably including the more doctrinal and foundational reform of EU Sales Law, first enshrined in the 1999/44 Directive. This volume focuses on the sales reform. After 20 years, the novelties range from more detailed structures to completely new phenomena such as goods with digital components, as well as innovative policies like sustainability in the design of contract law, and finally even a scission within contract law triggered by servitisation. The contributions take up the important aspects of this doctrinal and policy design-oriented reform of EU sales law. The volume thus discusses system building in this renewal, the challenges lying ahead, the lacunae still to be filled and the changes needed to reap the benefits of the (policy) reform.