The book "Esperanto: revolutionaries and geeks. Language policy, digital media and the formation of the international community" is a study of the history of the movement for the international language of Esperanto, which became a symbol of people's desire to communicate without barriers and asymmetry. The authors of the book reveal important aspects of the development of Esperanto as an ideology and community, study the impact of digital technologies and media on the spread of the language, and also explore the relationship between language practices and political processes. Through the prism of the history of a group of revolutionaries and geeks, the book offers answers to questions about how Esperanto is changing the way we understand language, communicate and interact in the digital age.