Kumail Rajani is a Postdoctoral Research Fellow in Islamic Studies at the University of Exeter. He is the editor of The Sound Traditions: Studies in Ismaili Texts and Thought (Brill, 2021) and co-editor of Shiʿi Legal Theory: Texts and Commentaries (EUP, 2023). He has also published an article, ‘Between Qum and Qayrawān: Unearthing early Shii ḥadīth sources’, in the Bulletin of the School of Oriental and African Studies (2021). Robert Gleave is Professor of Arabic Studies at the University of Exeter. His most recent book is Violence in Islamic Thought from European Imperialism to the Post-Colonial Era (EUP, 2021), co-authored with Mustafa Baig.