The next classical Taoist text we will feature is The Secret of the Golden Flower. It is a book about the art of meditation. Here is some information about it from Wikipedia.
The Secret of the Golden Flower ("Tai Yi Jin Hua Zong Zhi"), a Chinese Taoist book about meditation, was translated by Richard Wilhelm (also translator, in the 1920s, of the Chinese philosophical classic the I Ching). Wilhelm, a friend of Carl Jung, was German, and his translations from Chinese to German were later translated to English by Cary F. Baynes. According to Wilhelm, Lü Dongbin was the main originator of the material presented in the book (a section below, Reception from Chinese Taoists, suggests that the material is from Quanzhen School founder Wang Chongyang, a student of Lü Dongbin). More recently (1991), the same work has been translated by Thomas Cleary, a scholar of Eastern studies.