Hi, does anyone know where to find the works in English of this 9th century Byzantine theologian/philosopher? or even if they exist? I'm looking particularly for the text titled: ‘Positive exposition of Christian doctrine, developed from general concepts by means of dialectical method, rational arguments, and multiple syllogistic proofs, followed by a confutation of the letter sent by the Hagarenes to the Emperor Michael, son of Theophilus, in order to slander the Christian faith.’
That's the translated title in volume 1 of Christian-Muslim Relations, A Bibliographical History, but unfortunately, according to the entry, the only translation is in German: K. Förstel, Niketas von Byzanz. Schriften zum Islam, Würzburg, 2000 (Corpus Islamo-Christianum. Series Graeca 5), pp. 156-72.
So if you can read German or you can have the German translated into English, you're in luck...but there doesn't seem to be a published English version yet.