Bell, C. J. (2008). The Uyghur transformation in medieval Inner Asia: From nomadic Turkic tradition to cultured Mongol administrators. University of Louisville. Link
The study of Uyghurs is a fragmented field where periods are favored and others are neglected leaving the historical context of each period underdeveloped. Little effort is made to weave a narrative of the Uyghurs throughout their history and to explore the thread that unites them even today as they continue to draw upon a rich heritage. The Uyghurs underwent a profound transformation in the medieval era. By examining primary and secondary historical sources, a record surfaces that points to the forces behind this transformation. After establishing the Uyghurs’ roots in the nomadic Turkic tradition, Chinese, Sogdian, and Manichaean forces begin to shape them in the period of their qaghanate (744-840 CE). After the qaghanate, a nearly three hundred year diaspora begins where the Uyghurs not only continued to be shaped by the aforementioned forces, but also Buddhism, Nestorian Christianity, and the Indo-European natives of the Tarim basin.
Just leaving this here for future reading.