If you are interested in learning about Taoism I highly recommend “Foundations of Taoist Practice” by Jampa Mackenzie Stewart as an introductory article. It explains such concepts as: the Way (Tao), nothingness (Wu Ji), primordial energy (Qi), Yin And Yang, the Five Elements (Wu Hsing), the Eight Trigrams (Pa Kua), Martial Arts, Sexual Practice, Feng Shui and more.