Edgar Cayce (pronounced Kay-Cee, 1877-1945) has been called the "sleeping prophet," the "father of holistic medicine," and the most documented psychic of the 20th century. For more than 40 years of his adult life, Cayce gave psychic "readings" to thousands of seekers while in an unconscious state, diagnosing illnesses and revealing lives lived in the past and prophecies yet to come. But who, exactly, was Edgar Cayce and what were his psychic readings all about? This booklet covers the life of Cayce as well as an overview of the topics covered in his more than 14,000 documented psychic readings and tips for working with, studying, and understanding those readings.