Comprehensive Collection of Chinese Yi Studies, 291 volumes (TXT download)

Yi理 class: "The Great Yi - Exploring the Subtle" by Jin Wenjie, I think it's the best Yi book. "Exploring the Subtleties of Yi Principles," Preface to "The Great Yi - Exploring the Subtle." Shang Binghe: "Annotations on Jiao's Yi Forest," "Jiao's Yi Glossary," "Shang's Study of Zhouyi."