ISIS is often described as a terrorist organisation that uses social media to empower its supporters and reinforce its message. Through 12 case studies, this book examines the different ways in which Jihadi groups and their supporters use visualisation, sound production and aesthetic means to articulate their cause in online as well as offline contexts. Divided into 4 thematic sections, the chapters probe Jihadi appropriation of traditional and popular cultural expressions and show how, in turn, political activists appropriate extremist media to oppose and resist the propaganda. By conceptualising militant Islamist audiovisual productions as part of global media aesthetics and practices, the authors shed light on how religious actors, artists, civil society activists, global youth, political forces, security agencies and researchers engage with mediated manifestations of Jihadi ideology to deconstruct, reinforce, defy or oppose the messages.