This single volume compiles four foundational Zen texts: Huangbo Xiyun’s Essentials of the Transmission of Mind, Myōan Eisai’s A Treatise on Letting Zen Flourish to Protect the State, Eihei Dōgen’s Universal Recommendation for True Zazen, and Keizan Jōkin’s Advice on the Practice of Zazen. Together, they offer a rich and cohesive introduction to the heart of Zen practice and philosophy.