This scientifically grounded work provides an overview of assessment and intervention applications stemming from transpersonal concepts. Transpersonal clinical psychology revolves around the development of higher consciousness, including realizations that humans are profoundly interconnected to others, the environment, and the cosmos as a whole. It also involves the capacity for humans to beneficially function in various states of consciousness, as every human culture has ways of altering consciousness. Scientific research has demonstrated that various transpersonal practices, including meditation and prayer as well as different somatic practices such as yoga and tai chi, are associated with positive psychosocial changes and can be used to help people deal with a wide range of issues. Transpersonal clinical psychology goes beyond assessing and treating deficits by considering optimum development of human potential and also its goal, including moving towards what can be seen as self-transcendence and even spirituality. Delving deep into transpersonal practices, this two-volume work covers both their scientific and spiritual underpinnings. * Blends psychology, science, spirituality, and religion, addressing approaches that range from A (Akido) to Z (Zen) * Compares and contrasts many transpersonal psychotherapies including somatic approaches, holotropic therapy, hypnosis, neurofeedback, lucid dreaming, meditation, shamanism, psychedelic substances, and more * Shares transpersonal frameworks and measures for assessing and evaluating people and organizations * Provides appendices that list transpersonal psychology organizations, societies, membership organizations, and journals.