This book presents an interdisciplinary analysis of the Internet in Russia and its impact on various aspects of social life. The contributions discuss topics such as the features of the Russian media system and digitization processes, the history of the Runet, national Internet markets and the Internet economy, as well as legal aspects. By presenting the results of relevant case studies, it illustrates the process of integrating the Russian segment of the Internet into the international system, offering insights into various country-specific features of the Runet's functioning and development. The first part of the book focuses on the Internet in the context of development of the Russian media system with respect to historical features and digital inequalities. The second part then discusses economic and legal aspects of the Runet, while the third and the fourth parts offer an analysis of digital culture, including the role of journalism and regional diversities as well as online representations and discussions. The chapter "Runet in Crisis Situations" is available open access under a CC BY 4.0 license at link.springer.com.