"Theorising NATO is a useful exercise, worth reading for students and scholars of both NATO and IR theory. For NATO specialists, Webber and Hyde-Price’s book provides new answers to old questions – especially the ones connected to NATO’s persistence in the post-Cold War era. Both Flockhart’s constructivist analysis and the contribution on securitisation by Gabi Schlag (Otto von Guericke University of Magdeburg) offer answers to this question that are not superficial. For IR theory enthusiasts, Theorising NATO attests concretely to the importance of theory in International Relations and provides a practical and powerful demonstration that multiple theoretical points of view can coexist and reinforce one another harmoniously, if considered with sufficient analytical eclecticism."Federico Palmieri, Istituto Affari Internazionali (IAI), The International Spectator