Jay Spaulding is a medievalist by training who writes frequently about precolonial northeast Africa. His books include Kingdoms of the Sudan (with R. S. O’Fahey), After the Millennium, An Islamic Alliance and Een Kennismaking met de Afrikaanse Geschiedenis (with Lidwien Kapteijns), Public Documents from Sinnare (with M. I. Abu Salim) and The Heroic Age in Sinnar.Stephanie Beswick is an historian of South Sudan and has published numerous articles and recently a monograph—Sudan’s Blood Memory—on the history of the Dinka. She is the President of the Sudan Studies Association and the Director of African Studies at Ball State University, Indiana, USA.Carolyn Fluehr-Lobban is Professor of Anthropology and African Studies at Rhode Island College, USA. With relevance to Sudan she is the author of Islamic Law and Society in the Sudan and the forthcoming book Shari’a and Islamism in Sudan: Conflcit, Law and Social Transformation, and she is a co-author of the Historical Dictionary of the Sudan and co-editor of Race and Identity in the Nile Valley.Richard A. Lobban, Jr. is Professor Emeritus and former Chair of Anthropology, Rhode Island College, USA, where he was also the Director of African and African-American Studies. Presently he is Adjunct Professor of African Studies at the Naval War College, while serving as the Executive Director of the Sudan Studies Association. He is co-author of the Historical Dictionary of Sudan and of a recently released book on Sudan Security supported, in part, by a grant from the Office of Naval Research studying conflict in Sudan.