The Extension of Consciousness is a book written by C. W. Olliver in 1932, which serves as an introduction to the study of metapsychology. The book explores the concept of consciousness and how it can be expanded beyond its current limitations. Olliver discusses various theories and practices related to metapsychology, including telepathy, clairvoyance, and psychometry. He also delves into the history of metapsychology and its relationship with spirituality...