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Bekim Agai Mehdi Sajid Umar Ryad (eds.): Muslims in Interwar Europe. A Trans-Cultural Historical Perspective, Leiden 2015; Götz Nordbruch Mehdi Sajid Umar Ryad (eds.): Transnational Islam in Interwar Europe. Muslim Activists and Thinkers, New York:: Palgrave Macmillan 2014, 250 S. comparativ 2017, 27 (1), 117-121.