Speaking for Islam : religious authorities in Muslim societies / ed. by Gudrun Krämer and Sabine SchmidtkeA Jewish philosopher of Baghdad : ʿIzz al-Dawla Ibn Kammūna (d. 683/1284) and his writings / by Reza Pourjavady and Sabine SchmidtkeRational theology in interfaith communication : Abu l-Ḥusayn al-Baṣrī's Muʿtazilī theology among the Karaites in the Fāṭimid age / by Wilferd Madelung and Sabine SchmidtkeIbn Ḥazm of Cordoba : the life and works of a controversial thinker / ed. by Camilla Adang, Maribel Fierro, Sabine SchmidtkeThe Yemeni manuscript tradition / edited by David Hollenberg, Christoph Rauch, Sabine SchmidtkeAl-Ṣāḥib Ibn ʿAbbād promoter of rational theology : two Muʿtazilī kalām texts from the Cairo Geniza / edited by Wilferd Madelung, Sabine Schmidtke