'Makes a significant contribution to our knowledge concerning why states respond on terrorism in different ways. This book provides us with important insights on the logic of counterterrorism and is valuable for readers interested in international terrorism and international politics. It should be used by both advanced scholars and graduate students.' Ulf Bjereld, Department of Political Science, Gothenburg, Sweden 'Michael Karlsson provides us with a thorough and interesting study of this problematique, using a theory-guided comparative approach. An institutional design is tested through case studies and the book makes a rewarding contribution to the debate on global terrorism, describing as well as explaining the design of national counterterrorism institutions.' Stefan Höjelid, Linnaeus University, Sweden 'Overall, this book provides valuable insights into the design of post 9/11 counter terrorism institutions... The framework behaviours outlined by the author and their application to specific states following 9/11 are interesting and well written... This book is certainly worth reading by anyone interested in counter terrorism institutional design and the influences that can be exerted by external forces such as NATO.' Journal of Policing, Intelligence and Counter Terrorism