Book of Equanimity or Book of Serenity (Chinese: 從容錄 Cóngróng lù; Japanese: 従容錄 Shōyōroku) is a book compiled by Wansong Xingxiu (1166–1246), and first published in 1224. The book comprises a collection of 100 koans written by the Chan Buddhist master Hongzhi Zhengjue (1091–1157), together with commentaries by Wansong. Wansong’s compilation is the only surviving source for Hongzhi’s koans.