Although some historians have been researching and writing history from a transnational perspective for more than a century, it is only recently that this approach has gained momentum. But what is transnational history? How can a transnational approach be applied to historical study? Pierre Yves Saunier's dynamic introductory volume conveys the diversity of the developing field of transnational history, and the excitement of doing research in that direction. Saunier surveys the key concepts, methods and theories used by historians, helping students to find their own way in this vibrant area.