The articles included in this book deal with various aspects of international migration analyzed from different methodological perspectives. What unites this collection of articles is that they deal with peripheral borders, separating rich and poor regions of our globe. They analyze the challenges and problems faced by the European Union and its member states, including Spain and Poland - states with external sea and land borders of the EU. The position of a peripheral country causes a number of problems related to illegal immigration, experienced by Poland and Spain alike. The United States face a similar problem on the border with Mexico. Undoubtedly, as a result of migration pressure, both the European Union and the United States increasingly resemble a besieged fortress.

This book addresses the issues of radicalism and terrorism, which are of exceptional importance and relevance in contemporary society. Each of the two phenomena are analyzed from a multidisciplinary perspective. The book contains articles which explore legal, political, psychological, economic and social aspects of radicalism and terrorism. A portion of the contributions are of a theoretical nature, they constitute an attempt at constructing analytical frameworks for studies on the two phenomena. There are also studies of particular cases, such as radicalism in Poland and in Spain, as well as within the European Union as a whole. This collective work is a response to the need for analyses of two issues which are increasingly responsible for determining the level of security which characterizes the contemporary world.