Twitter is a household name, discussed for its role in national elections, natural disasters, and political movements, as well as for what some malign as narcissistic “chatter.” The first edition of Murthy’s balanced and incisive book pioneered the study of this medium as a serious platform worthy of scholarly attention. Much has changed since Twitter’s infancy, although it is more relevant than ever to our social, political, and economic lives. This timely second edition shows how Twitter has evolved and how it is used today. Murthy introduces some of the historical context that gave birth to the platform, while providing up-to-date examples such as the #blacklivesmatter movement, and Donald Trump’s use of Twitter in the US election. The chapters on journalism and social movements have been thoroughly updated, and completely new to this edition is a chapter on celebrities and brands. Seeking to answer challenging questions around the popular medium, the second edition of Twitter is essential reading for students and scholars of digital media.