Book excerpt: This international collection provides a comprehensive overview of twin cities in different circumstances – from the emergent to the recently amalgamated, on 'soft' and 'hard' borders, with post-colonial heritage, in post-conflict environments and under strain. With examples from Europe, the Middle East, Africa, Asia, South America, North America and the Caribbean, the volume sees twin cities as intense thermometers for developments in the wider urban world globally. It offers interdisciplinary perspectives that bridge history, politics, culture, economy, geography and other fields, applying these lenses to examples of twin cities in remote places. Providing a comparative approach and drawing on a range of methodologies, the book explores where and how twin cities arise; what twin cities can tell us about international borders; and the way in which some twin cities bear the spatial marks of their colonial past. The chapters explore the impact on twin-city relations of contemporary pressures, such as mass migration, the rise of populism, East-West tensions, international crime, surveillance, rebordering trends and epidemiological risks triggered by the COVID-19 pandemic. With case studies across the continents, this volume for the first time extends twin-city debates to fictional imaginings of twin cities. Twin Cities across Five Continents is a valuable resource for researchers in the fields of anthropology, history, geography, urban studies, border studies, international relations and global development as well as for students in these disciplines.