The central free movement of goods provision has not only provoked more litigation than any other E.C. Treaty provision but also, with one or two exceptions, more sterile academic comment. Yet, it is only by grubbing around in the dirt that one finds gems, and Dr Poiares's book is a real diamond. Based upon his doctorate, it provides the most elaborately argued and most extensively researched thesis on Article 30; sweeping in its panorama; unique in its integration of perspectives of institutional efficacy and political economy into the normative debate, and intelligent in its execution. It will be a must read; for students and specialists alike for many years to come. Damian Chalmers Law Quarterly Review September 2002 ... the reviewed book represents an extremely interesting piece of work which may be regarded as pioneering, especially in the field of law concerned with the free movement rules within the European Union, but perhaps also more generally in the field concerned with the constitutional dimensions of this legal orderthe author, in a well written and engaging style, brings us behind the text of article 30 EC and the relevant case law to an understanding of the real and difficult issues involved. This book will be influential in this field of law and may therefore be highly recommended. Ulla B. Neergaard Maastricht Journal of European and Comparative Law