Book excerpt: This timely book explores how the internet and social media have permanently altered the media landscape, enabling new actors to enter the marketplace, and changing the way that news is generated, published and consumed. It examines the importance of citizen journalists, whose newsgathering and publication activities have made them crucial to public discourse and central actors in the communication revolution. Investigating how the internet and social media have enabled citizen journalism to flourish, and what this means for the traditional institutional press, the public sphere, and media freedom, the book demonstrates how communication and legal theory are applied in practice.