Noah Salomon, author of "For Love of the Prophet: An Ethnography of Sudan's Islamic State" (Princeton University Press, 2016) and winner of AAR's 2017 Award for Excellence in the Study of Religion in the category of analytical-descriptive studies, talks to Kristian Petersen about his fieldwork in Sudan, the attempts at a unified Sudan prior to the 2011 partition, and tradition of the Islamic nation-state.