North American Regionalism: Stagnation, Decline, or Renewal?, edited by Tom Long and Eric Hershberg (American University), was published on 1 December by University of New Mexico Press. Although North America was a central case in the development of IR’s study of regionalism in the early 1990s, the region has garnered less attention in recent years—even as the study of regions in IR dramatically expanded. This volume reconnects North America with this body of scholarship, asking both what the North American case can contribute to how IR scholars understand regionalism, and what new currents in IR can help us understand about North America. It includes the work of scholars from Canada, Mexico, the United States, and Europe, with themes including region-building, migration, security, trade, and institutions. The book is the culmination of the Robert A. Pastor North American Research Initiative, a multinational research network based at American University and chaired by Tom Long since 2016.