Wilferd Madelung, D. Phil. 1957, University of Hamburg, is emeritus Laudian Professor of Arabic at Oxford University. He has written extensively on early Islamic history, religious movements and schools of thought, and is the author of The Succession to Muhammad (Cambridge, 1997), and co-editor of An Ismaili Heresiography (Leiden: Brill, 1998), Rational Theology in Interfaith Communication (Leiden: Brill, 2006), Baṣran Muʿtazilite Theology (Leiden: Brill, 2011), Early Ibāḍī Theology (Leiden: Brill, 2014), Al-Ṣāḥib Ibn ʿAbbād Promoter of Rational Theology (Leiden: Brill, 2016) and the Encyclopaedia Islamica (Leiden: Brill). Abdulrahman al-Salimi (Ph.D. Durham 2001) is the editor in chief of the Omani journal al-Tafahom. He has published on Omani studies and early Islamic theology and is the author of Ibadism in East Mesopotamia. Early Islamic Iran, Central Asia and India (Beirut: German Oriental Institute, 2016) and co-editor of Early Ibāḍī Theology (Leiden: Brill, 2014) and Early Islamic Law in Basra in the 2nd/8th Century (Leiden: Brill, 2017).
The scientific edition of these fourteen early Ibadi texts, all from the 2nd/8th century, together in one book, constitutes a welcome addition to the growing body of newly edited and published old Ibadi texts. - Martin Custers, in: Bibliotheca Orientalis LXXVI N Degrees 1-2 (2019)