Beyond the Daode jing: Twofold Mystery in Tang Daoism is the first monograph to present early Twofold Mystery (chongxuan) teaching to a Western audience: historical context, protagonists, major texts, and philosophy, including cosmogony, epistemology, salvation, and the pantheon.
The book provides a superb introduction to the intricate philosophy of Twofold Mystery; it also explores an important but so far unknown field in the intellectual history of China: Tang Daoist religious philosophy.