How can twin city arrangements benefit the sister cities? GMS Executive Committee member Professor Michel Laguerre explores diverse contemporary models of cross-border city-to-city entanglements with a view to promoting friendship, border management, entrepreneurialism, urban development, transnational municipal policy, and digital embeddedness. In his new book, Global City-Twinning in the Digital Age (University of Michigan Press, 2020), Professor Laguerre selected multiple cities involved in sororal arrangements--including Berkeley, Budapest, Casablanca, Istanbul, Paris, Prague, San Diego, and San Francisco-- for field research and collection of qualitative data for the project. These case studies, or composite urban biographies, allow an opportunity to identify successful sister-city relations that materialize through (1) transfers of technical knowledge, professional skills, capital, and goods; (2) collaboration in terms of joint training and the sharing of best practices of urban governance, urban planning, and local democracy; and (3) understanding emergent forms of transnational municipal management, cross-border administrative cultures, and aspects of global urban politics. These selected aspects of cross-border sister-city practices are deconstructed and interpreted in this study through the disciplinary lens of globalization theory.