"Principles of Digital Democracy" offers a comprehensive analysis of the tools and practices of digital democracy, based on nearly a decade of practical experience. The book explores various aspects of digital democracy, including opportunities for citizen engagement and the challenges of implementing security and policy measures. It highlights case studies from different countries, including Canada, Italy, and Taiwan, providing deep insights into the life cycles of citizen participation. Through interviews with organizers and participants, it further deepens the understanding of who engages in digital democracy processes and why. The combination of theoretical foundations and practical examples makes this work a valuable resource for anyone looking to address the challenges and opportunities of digital democracy.