It is a special pleasure to welcome the 23rd book in the series The Common Core of European Private Law. This book is edited by two scholars, who together represent two different legal cultures: the Dutch and the Scottish. Their works are already renowned and appreciated well beyond the ‘Common Core’ circles.

The Common Core project was launched in 1993 at the University of Trento under the auspices of the late Professor Rudolf B. Schlesinger. The methodology used in the Common Core project, then novel, is now a classic. By making use of case studies, it goes beyond mere description to detailed inquiry into how most European Union legal systems resolve specific legal questions in practice, and to thorough comparisons between those systems. It is our hope that these volumes will provide scholars with a valuable tool for research in comparative law and in their own national legal systems. The collection of materials that the Common Core project is offering to the scholarly community is already quite extensive and will become even more so as more volumes are published. The availability of materials attempting a genuine analysis of how things seem to be is, in our opinion, a prerequisite for an intelligent and critical discussion on how they should be. Perhaps in the future European private law will be authoritatively restated or even codified. As of today, the Common Core project is the longest-running scholarly enterprise in the field.