"The book is inspiring and opens up new lines of research, such as the seven themes set forth in the Introduction, to which several others could be added, such as everyday border and cross-border practices and the representation of twin cities in the media, film, and literature. Personally speaking, reading this book has led me to wonder about how twin cities fascinate, how they are idealized, and how these two elements influence their conceptualization. It also makes me wonder what kind of spatial objects at different scales (bodies, buildings, neighborhoods, cities, regions, protected areas, etc.) and on distinct borders (not only political borders) also can be considered twins." - Xavier Oliveras-González, Journal of Borderlands Studies