This book provides a detailed insight into the complex dynamics of radicalization that are in play amongst contemporary society. The authors focus on understanding emerging trends and models that can be used to analyse and understand modern violent extremist and xenophobic discourse. The chapters cover multiple regions, providing a collective analysis of country-specific case studies for the formulation of best practices, recommendations and learning material. It is recommended that this book may serve as a compendium for practitioners, academics, teachers and students wishing to gain state-of-the art knowledge. Topics covered by the authors vary from hands-on practical information to tactical, operational, strategic and ethical guidance. This book provides a holistic, harmonized approach based upon European internal security strategies recognizing that internal security cannot be achieved in isolation from the rest of the world. Additionally, this material resonates with the EU's commitment to fight extremism in a rational manner, alongside promoting human rights, democracy, peace and stability within the EU Member States.