"Heathen Slaves and Christian Rulers" is a book written by two outstanding historians - Elizabeth Wheeler Andrew and Catherine K. Bushnell. In their work, the authors draw attention to the importance of the topic of slavery in early medieval Europe and study the religious, social and political aspects of this phenomenon. The book reveals the complex relationships between pagans and Christians in medieval Europe, as well as the influence of religion on the formation of socio-cultural realities of that time. Thanks to an in-depth analysis of the sources and the historical context, the authors shed light on little-known aspects of life in the areas where different cultures and religions were intertwined. "Ungodly slaves and Christian masters" is an important development in the study of medieval history and contributes to the understanding of the complex period of the formation of Western European civilization.