Most Popular Books
- The Succession to Muhammad: A Study of the Early Caliphate
- Studies in Medieval Muslim Thought and History
- Der Imam Al-Qasim Ibn Ibrahim Und Die Glaubenslehre Der Zaiditen
- Arabic Texts Concerning the History of the Zaydi Imams of Tabaristan, Daylaman and Gilan: Engl. /Arab.
- An Ismaili Heresiography: The 'Bāb Al-Shayṭān' from Abū Tammāms' Kitāb Al-Shajara
