This publication is the third book in the 'European Procurement Law Series'. The publications in the Series consider the current state of law in the EU and looks into the interpretation, implementation and practice in a range of Member States. An important part of the books is a comparative analysis based on the in-depth analysis of the state of law in selected Member States. The books are written by a group of European academic experts of which several members give legal advice in the field of public procurement. The members of the group currently come from Italy, Germany, France, United Kingdom, Spain, Poland, Rumania and Denmark. The field of EU public procurement law is one of the few fields of EU law where a very developed enforcement regime is in place. Furthermore, recent legislation and practice from the European Court of Justice ensures an even higher level of effectiveness than previously. The analysis focus on national enforcement of the EU public procurement rules as enforcement mainly takes place at national level and the recent changes introduced with Remedies Directive 2007/66 are important but also unclear on substantial points. The new remedy ineffectiveness of concluded contracts will be given particular attention in the publication. Enforcement at supranational level will also be considered with emphasis on the possible interaction between national and supranational enforcement of the rules.