Sarah Stroumsa, Guy G. Stroumsa 
 Eine dreifältige Schnur: Über Judentum, Christentum und Islam in Geschichte und Wissenschaft
[A Cord of Three Strands: On Judaism, Christianity, and Islam in History and Scholarship.]
 2020. 244 pages.    Summary 
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 Sarah Stroumsa examines the intercommunal balance between Christian, Jewish, and Muslim communities in the medieval Islamic East, known as convivencia, while Guy G. Stroumsa focuses on the study of Judaism and Islam in nineteenth century European scholarship.