Explores the complex relationship of the Vikings with the medieval world. Investigates the complexity of the Viking expansion, not only in terms of raiding and conflict, but also as a process of diplomacy, settlement, assimilation, and colonization. Examines developments within Scandinavian society such as state formation, social structures, trade, shipbuilding, slavery, urban growth, and Christianization. Considers the methodological difficulties presented by the diverse and often contradictory historical sources for information about the Vikings, such as chronicles, archaeology, coin hoards, stone inscriptions, and sagas.