Three Strategies of Huang Shigong
The Three Strategies of Huang Shigong is a treatise on military strategy that was historically associated with the Taoist hermit Huang Shigong and Han dynasty general Zhang Liang. Huang Shigong gave this treatise to Zhang Liang, that allowed Zhang to transform into an adept statesman and powerful war theorist.
Source: Wikipedia — Three Strategies of Huang Shigong (CC BY-SA 4.0)