This book is a collection of speeches and writings by the former leader of the People's Republic of China. It covers a wide range of topics including communism, revolution, class struggle, and the correct handling of contradictions among the people. The book was published with the intention of promoting the leader's ideology and was widely distributed during the Cultural Revolution. It was considered an essential guide to life and politics in China during this period.

This ancient Chinese text is a divination system and book of wisdom. It provides guidance for moral and ethical decisions through 64 hexagrams, which are six-line figures made up of broken and unbroken lines. Each hexagram represents a specific situation or state of affairs, and the text provides interpretations and advice for each. The book has been used for centuries as a tool for decision-making, prediction, and gaining deeper understanding of situations and relationships.