In Between The Seas, Deborah Paci takes a comparative view of insularity in island identities through case studies of islands in the Baltic and Mediterranean Seas. These case studies include, in the Baltic case, Gotland, Saaremaa and Hiiumaa; and in the Mediterranean case, Sicily, Sardinia, Malta and Corsica. Examining multiple sites of these islands' identities such as history, environmental concerns and governance systems, this study provides a historical perspective into the relations between islands and the larger geopolitical regions around them as well as historicizing "insularist" rhetoric deployed by pro-independence groups within them. Paci examines the changing role and increasing political importance of islands in the European Union against the history of island insularity and offers a significant contribution to the wider field of island studies.