Recent studies of Indonesian Islam have pointed to the growing prominence of 'conservative' and globally expansive Islamic doctrines. Salafism is one such doctrine, and it has gained increasing popularity in Indonesia over the past several decades. Aiming to propagate a 'literalist' interpretation of Islam, Salafi activists argue that many local Islamic traditions, histories and cultures are unIslamic. This has led to significant controversy, and accusations by many Indonesians that Salafism is foreign to country, an intolerant religion, and should have no part in the religious life of the nation. This book offers an ethnographic study of this often misunderstood and controversial movement. It explains why Salafism is growing in numbers, especially amongst young people, and how Salafi activists promote their faith within the wider public. It explores the range of propagational activities and products Salafis use in their public outreach, including literature, mosque sermons, social media ventures, and even fashion, and describes how these activities are tailored to a young Indonesian audience. Salafis may have global roots, but as this book outlines, its success in Indonesia is best understood as an intrinsically local phenomenon entangled within Indonesian ideas of Islamic praxis, consumerism, modernity, political action and citizenship. Salafi activists do not see themselves as foreign religious agents or detached from Indonesian life, but increasingly as part of a religiously conservative moral vanguard. Salafism is, consequently, part of the broader re-orientation of social, cultural and political life we are seeing in contemporary Indonesia.