Koans such as “What is the sound of one hand clapping?” have become part of everyday speech, yet those who encounter them while exploring Zen practice often find them utterly baffling. This book offers valuable guidance on how to work with some of the beginning koans, revealing an uncommon depth of insight and an easeful technical mastery of Zen’s most misunderstood and powerful tools. Included are teachings on fundamental koans including Joshu’s Dog and The Source of Mu, as well as lesser-known beginner's koans.