Book excerpt: Long a topic of historical interest, wartime captivity has over the past decade taken on new urgency as an object of study. Transnational by its very nature, captivity’s historical significance extends far beyond the front lines, ultimately inextricable from the histories of mobilization, nationalism, colonialism, law, and a host of other related subjects. This wide-ranging volume brings together an international selection of scholars to trace the contours of this evolving research agenda, offering fascinating new perspectives on historical moments that range from the early days of the Great War to the arrival of prisoners at Guantanamo Bay.