»Data Protection and Competition Law«: The book examines the overlaps between antitrust law and data protection concerns. The focus is on the Facebook proceedings of the German Federal Cartel Office, which considers data protection violations to be prosecutable by means of antitrust law. It is difficult to draw the line between the two areas of law. Fabian Uebele examines their interplay and shows synergies between the two areas of law. He thus makes a contribution to the law on the regulation of online platforms.