Petra M. Sijpesteijn: Shaping a Muslim State. The World of a Mid-Eighth-Century Egyptian Official. Oxford 2013, xxvii + 524 S., Ill., ISBN 978-0-19-967390-2. Maged S. A. Mikhail: From Byzantine to Islamic Egypt. Religion, Identity and Politics after the Arab Conquest. London / New York 2014, xiii + 429 S., ISBN 978-1-84885-938-8