"Harmonising Digital Law" has become a crucial task for European and national legislation in view of the challenges of the "digital revolution" for the European Union and for its Member States. The implementation of the 2019 "Twin Directives" on the sale of goods and the supply of digital content and services represents one of the most important steps on this path so far. In addition to the harmonization of Member State law, the emergence of a uniform law of the EU is becoming more and more important with regard to the challenges of digitization, as recently shown in particular by the Internet Platform Regulations. In view of these changes at European and national level, 40 legal scholars from all EU Member States examine in this volume the impact of European legislation on the development of private law in Europe on the basis of common questions. A number of other contributions analyse the overarching features of harmonization, the contours and effects of legal unification with regard to the Internet Platform Regulations, Smart Contracts and the further perspectives of EU legislation in face of digital and sustainability challenges.