This fifth volume from the Munster Colloquia on EU Law and the Digital Economy focuses on one of the most important challenges faced by private law in this era of digitalisation: the effects of 'data as counter-performance' on contract law; a phenomenon acknowledged by the EU legislator in the new Digital Content Directive 2019/770. In the book, legal experts from across Europe examine various issues, in particular contract performance and restitution and the relationship between contract law and data protection.