Katarzyna Granat's analysis is particularly thorough and addresses numerous aspects of the functioning of the EWS... Granat manages to successfully uncover several dimensions of this issue which had thus far not been examined... The issues considered in the last three chapters - principle of conferral, delegation of powers and fundamental rights - are also particularly original and will undoubtedly be useful for anyone looking at the EWS from now on. These are all but a few of the aspects that should invite scholars interested in parliamentary democracy within the EU to read this monograph. -- Diane Fromage * Rivista di Diritti Comparati * The evolving role of national parliaments in the EU has led to a wealth of academic literature in recent decades. In this crowded field, Granat's analysis of the early warning mechanism is able to add value and originality, due to its rigorous doctrinal analysis of the reasoned opinions submitted by national parliaments. -- Andrew Woodhouse * Common Market Law Review * Granat's work has significant strengths. Primarily it boasts a remarkable empirical richness, providing the reader with ample footnotes and concrete examples of early warning system applications... Throughout the book, Granat's investigative reasoning is logical and easy to follow. Her comprehensive analysis on each different facet of the early warning system and subsidiarity is truly impressive. -- Thomas Larue * Journal of Common Market Studies *