Hamada Hassanein is Assistant Professor at Prince Sattam bin Abdulaziz University (Saudi Arabia), on secondment from Mansoura University (Egypt). His academic interest is the application of linguistic theories to Arabic texts. His recent publications include Arabic Antonymy Translation (2017) and Discourse Functions (2018).

Jens Scheiner is Professor of Islamic Studies at the University of Göttingen (Germany). His research interests are the political and social history of the early and classical periods of Islam and HadithStudies (in particular isnad-cum-matnanalysis). He published on the early Muslim conquests, the cultural history of Baghdad and hadith.