Son (Japanese Zen) has been the dominant form of Buddhism in Korea from medieval times to the present. A Handbook of Korean Zen Practice: A Mirror on the Son School of Buddhism (Son'ga kwigam) was the most popular guide for Son practice and life ever published in Korea and helped restore Buddhism to popularity after its lowest point in Korean history. It was compiled before 1569 by Sosan Hyujong (1520-1604), later famed as the leader of a monk army that helped defend Korea against a massive Japanese invasion in 1592. In addition to succinct quotations from sutras, the text also contained...