This book challenges the existing focus in EU citizenship scholarship which tends to look only at the economically active. Arguing that the deliberately vague EU concept of 'work' allows for its restricted application in Member States, it shows how many workers and economic contributors are left out of the free movement regime. It does this by taking a mixed methods approach: relying on both qualitative case studies and legal analysis of EU and UK legislation, case law, and decision maker guidance. All this leads to the author making a significant and original argument that, if EU free movement rights are awarded on the basis of market credentials, more must be done to work towards a more contemporary, accurate and inclusive market citizenship. Provocative and thought-provoking, this will appeal to all scholars of EU free movement law.