This book offers an accessible guide to the role that Zen has played and, alongside Buddhism, might play in both Eastern and Western attempts to alleviate mental suffering.  Since its beginnings 2500 years ago, the central belief of Buddhism has been that what we perceive as “reality” is a mental representation; a religious belief which has since been substantiated by the evidence of neuroscience. The work and progress of clinical medicine, psychiatry and psychology have attempted to alleviate the sufferings of life, but the current approaches to mental health in psychiatry, the neurosciences and cognitivism don't fully address the complexity and mutual inter-relationship of the variety of factors involved in mental suffering, and its non-linear and chaotic aspects. Zen Buddhism, on the other hand, encourages access to reality, and so this book will explore, scientifically, the ways in which it’s guiding principles can be deployed to support and enhance Western, clinical solutions to mental strife.