Yang: Between Winds and Clouds - The Making of Yunnan (Second Century BCE to Twentieth Century CE)
Investigation into Yunnan's ties with SE Asia and how it came to become the part of China that the province now is.
Columbia University Press
2004, ISBN 9780231142540
Related Reading
History
If you are a history buff, maybe these books are for you, but probably you have read them already.
Nanzhao History
History of Nanzhao