This handbook provides contributions by some of the world-leading experts in the field on recent phenomena and trends in transnational terrorism. Based on the methodological approach of a trend-and-key factor analysis of transnational terrorism and processed on the virtual platform 'Foresight Strategy Cockpit' (FSC), the volume seeks to examine what potential future variants of transnational terrorism may evolve. Focusing on the latest structural developments in the sphere of politically or religiously motivated violence, the handbook considers the tactical, strategic, and not least the systemic dimension of terrorism. Divided into seven thematic sections, the handbook’s contributions cover a wide range of issues, dealing among others with strategic and hybrid terrorism, the systemic dimension of extremist violence, prevalent actors, counter-narratives, the crime terror-nexus, the role of digitalization and the spiral dynamic between Islamist and right-wing terrorism. The expert