Clairvoyance and Occult Powers is a great introduction into the world of occultism. Teaches extra sensory powers of man like telepathy and clairvoyance, and then going into more advanced topics like mind reading, psychometry and crystal-gazing.  It explores space and time, second-sight and astral-body traveling. There is full explanation of psychic laws & principles, how one exerts influence over another and magnetic healing.