William Walker Atkinson (18621932) was an American writer, merchant, attorney, publisher, and occultist. He was a pioneer of the New Thought and Prosperity Consciousness movements, and wrote dozens of books on various aspects of learning mentalism, psychic power development, and clairvoyance. He wrote Clairvoyance and Occult Powers under the guise of Swami Panchadasi, one of several pseudonyms.

Clint Marsh is a writer and publisher of practical esoterica. He has served as Reginald Bakeley's American editor since 1998, and maintains a website at www.wonderella.org.