Islamic State stunned the world when it overran an area the size of Great Britain on both sides of the Iraq-Syria border in a matter of weeks and proclaimed the birth of a new Caliphate. In his timely book Islamic State: The Digital Caliphate, one of the Arab world’s most respected journalists Abdel Bari Atwan draws on his unrivaled knowledge of the global jihadi movement and Middle Eastern geopolitics. Based on extensive field research and exclusive interviews with IS insiders, the book outlines the group’s leadership structure, as well as its strategies, tactics, and diverse methods of recruitment. He also shows how the group’s rapid growth has been facilitated by its masterful command of social media platforms, the “dark web,” Hollywood blockbuster-style videos, and even jihadi computer games, producing a powerful paradox where the ambitions of the Middle Ages have reemerged in cyberspace. Islamic State has to be increasingly understood as a nation. Atwan draws a convincing picture of the Islamic State as a well-run organization that combines bureaucratic efficiency and military expertise with a sophisticated use of information technology.