Drawing on more than a decade of research on political Islam in the West, he keenly analyzes a controversial movement that still remains relatively unknown. Conducting in-depth interviews on four continents and sourcing documents in ten languages, Vidino shares the history, methods, attitudes, and goals of the Western Brothers, as well as their phenomenal growth. He then flips the perspective, examining the response to these groups by Western governments, specifically those of Great Britain, Germany, and the United States. Highly informed and thoughtfully presented, Vidino's research sheds light on a critical juncture in Muslim-Western relations.