Islamic sectarian polemics, Islamic historiography and hadith criticism, contemporary Islamic political movements, Shi’ism, and Islam in America
Co-edited with Richard Martin, Islamism: Contested Perspectives on Political Islam. Stanford University Press, 2009. "The Persistence of Heresy: Paul of Tarsus, Ibn Saba, and Historical Narrative in Sunni Identity Formation" in Numen, special edition on Cultural Memory and the Study of Islam, edited by Andrew Rippin, (forthcoming Spring 2011).Selected Publications:
