Introduction; 1. Contesting digital sovereignty: untangling a complex and multifaceted concept Min Jiang and Luca Belli; Part I. State-centric Formations of Digital Sovereignty: 2. Sociotechnical imaginaries of digital sovereignty in China, Russia and India: from NWICO and WSIS to SCO and BRICS Johannes Thumfart; 3. The spatial expansion of China's digital sovereignty: extraterritoriality and geopolitics Wanshu Cong; 4. South African digital sovereignty at the crossroad of securitization and development Enrico Calandro; Part II. Techno-economic Structurings of Digital Sovereignty: 5. Digital sovereignty and payments: a case study of the National Payments Corporation of India Venkatesh Hariharan and Sarayu Natarajan; 6. Digital statecraft of middle powers: tech landscape and digital sovereignty in Brazil and India Vashishtha Doshi and Henrique Delgado; 7. A modulated approach to digital sovereignty: exploring Huawei-led smart city initiatives in South Africa and Italy Stefano Calzati; Part III. Grassroots Contestations of Digital Sovereignty: 8. Circumventing the 'sovereignisation' of the Russian internet: towards an infrastructure-based sociology of digital sovereignty and its resistances in Russia Olga Bronnikova, Françoise Daucé, Ksenia Ermoshina, Valery Kossov, Benjamin Loveluck, Francesca Musiani, Bella Ostromooukhova, Perrine Poupin and Anna Zaytseva; 9. Brazilian activism in Mastodon: sovereignty discourses between cyberlibertarianism and state-centrism Tales Tomaz; Conclusion; 10. Digital sovereignty from the BRICS structuring self-determination, cybersecurity, and control Luca Belli and Min Jiang.