With The Mirage of the Saracen, Walter D. Ward has written a fine study of Christian colonization, spatial and spiritual, of the Sinai Peninsula.

Walter D. Ward. The Mirage of the Saracen: Christians and Nomads in the Sinai Peninsula in Late Antiquity. Transformation of the classical heritage, 54. Oakland, CA: University of California Press, 2015.

From Bryn Mawr Classical Review (BMCR). Review by E. J. Hutchinson, Hillsdale College