Uyghurs and Uyghur Identity by Dr. Dolkun Kamberi
In Uyghurs and Uyghur Identity, Dr. Dolkun Kamberi helps readers understand Uyghur culture, language, literature, history, art, and religious identity, and shows that the Uyghurs have been an important part of Central Asia since ancient times despite present-day Chinese claims to the ownership of their land. Here, the author presents his views from several perspectives drawn from personal study, research, analysis, and the translation of medieval Uyghur manuscripts. – Radio Free Asia
Some of those translations from medieval Uyghur manuscripts are published in another book which I own and they are fascinating. I presume this book would be pretty good for understanding a part of the Uyghur identity.