四书 Traditional form: 四書 Pinyin (reading): Sìshū Definitions: Four Books, namely: the Great Learning 大學/大学, the Doctrine of the Mean 中庸, the Analects of Confucius 論語/论语, and Mencius 孟子 Characters: 四 - four 书 - book, letter, document; writing Traditional characters: 四 - four 書 - book, letter, document; writing