The book argues that EU law has developed a ius civilis digitalis, namely a law for the digital society via the regulation of private relationships. After the failure of the Draft Common Frame of Reference and the European Constitution, the EU is about to establish a Digital Common Frame of Reference – a ius civilis digitalis- and a Digital Constitution, which is widely discussed under the catchword of 'digital constitutionalism'. The book points to the under-researched dimension of the impact of the EU digital regulations on private relations against the backdrop of wider societal concerns. Leading experts from the world of private law and regulation give fascinating insights into this fast-developing field of law.