This single volume compiles four foundational Zen texts:

1. Huangbo Xiyun’s Essentials of the Transmission of Mind
2. Myōan Eisai’s A Treatise on Letting Zen Flourish to Protect the State
3. Eihei Dōgen’s Universal Recommendation for True Zazen
4. Keizan Jōkin’s Advice on the Practice of Zazen

Together, they offer a rich introduction to the texts of Zen practice and philosophy.