In Dealing with Terrorism – Empirical and Normative Challenges for Fighting the Islamic State an international panel of experts analyses current trends and new developments in legal systems and in law enforcement in Europe as well as in the USA and the Middle East. Offering a succinct overview with special focus on criminal law, police law, and European and international law, the book provides unique insights into what dealing with terrorism means to European and non-European countries. It includes material from non-English-speaking countries that is seldom available to a broader academic community. Its comparative approach offers readers three levels of understanding: by country, in terms of the European Union, and the international community as a whole. The book is geared at specialists in national and international institutions, scholars, and students in the field but will also be of great interest to the wider legal community. Its profound insights and expert perspectives enhance the ongoing national and international debate on public security issues by striking a balance between freedom and security.