Peter Zieme is Emeritus of the Institute of Turcology at Free University, Berlin, Germany. At the Berlin Brandenburg Academy of Sciences and Humanities he was a research member in the Turfan project. He pas published books and studies on Old Uigur culture of Central Asia.
The book presents a full documentation of the Old Uigur texts of the Church of the East known from several places of Central Asia, mainly Bulayık and Kurutka in the Turfan oasis, as well as Xaraxoto, from the 10th to 14th century.