Posting of Workers in EU Law is a pioneering book that challenges the recently adopted Directive (EU) 957/2018, which came into effect in July 2020, by examining the relevant EU regulatory framework and investigating the actual quantitative dimension of the posting phenomenon and its real impact on the EU labour market. The dynamic expansion of the phenomenon of posting of workers – whereby a worker is sent for a limited time to another Member State to provide a service – is a formidable bone of contention in the conflict between a fully integrated internal market economy and Member States’ aims to protect domestic social standards. Through this book, the author exposes a severe misalignment of the legal framework provided for by the new Directive with the EU values and principles of equality, solidarity and fair competition.