The Caliph and the Heretic: Ibn Sabaʾ and the Origins of Shiʿism. By Sean W. Anthony. Islamic History and Civilization, vol. 91. Leiden: Brill, 2012. Pp. xiii + 352. $189, €152.

Controversies in Formative Shi‘i Islam: The Ghulat Muslims and Their Beliefs. By Mushegh Asatryan. Shi‘i Heritage Series, vol. 4. London: I.B. Tauris, in association with the Institute of Ismaili Studies, London, 2016. Pp. xviii + 206. $48.50, £29.50.

Twelve Infallible Men: The Imams and the Making of Shiʿism. By Matthew Pierce. Cambridge, Mass.: Harvard University Press, 2016. Pp. ix + 254. $45, £35.95, €40.50.