Yang Xianping 
Secret History of Xiongnu 

This book comprehensively shows the origin of the eastern Xiongnu and its major historical activities in the Mongolian Plateau. It focuses on the early legend of Xiongnu, the battle between Qin and Xiongnu, Modu "killed his father with an whistling arrow", besieging Liu Bang on Baideng Mountain, trampling on Donghu, expelling Yuezhi and other major events.