Using an innovative 'law and political science' methodology, this timely book carries out a critical assessment of the reform of the EU public procurement rules. It provides a rich account of the policy directions and the spaces for national regulatory decisions in the transposition of the 2014 Public Procurement Package, as well as areas of uncertainty and indications on how to interpret the rules in order to make them operational in practice. Most EU law research focuses on the content of rules and the impact of case law on their interpretation and application. It rarely discusses how the CJEU's case law influences the creation of new rules, or the way EU law-makers enact them - issues which, conversely, are a staple for political scientists. By blending both approaches this book finds that political science provides a useful framework to describe the law making process and shows that the influence of the CJEU was significant. Though the specific case studies identify many reforms, the ultimate assessment is that EU public procurement law was deformed. Offering a clear contribution to the emerging scholarship on 'flexible' EU law-making, this book's novel methodology will appeal to scholars and students of both law and political science. Law and policy makers as well as legal practitioners will also find its practical approach compelling.