The Shoyoroku or Book of Serenity is a collection of 100 koans written by the Chan Buddhist master Hongzhi Zhengjue (1091–1157). To learn more, see Wikipedia.
The following are commentaries by Rochester Zen Center teachers.
Case Number 14
Case Number 20
Case Number 32
November 2019 Sesshin, Day 7
Teisho by Roshi Bodhin Kjolhede.