Dr. Lehman recovers an important ancient aspect of astrology which has become misunderstood and diluted; rulerships. By attempting to simplify astrology, contemporary sources have completely obscured the essential differences between planet, sign, and house. While the novice may benefit from this simplification, much of the old logic of the rulership system is covered up. By researching ancient manuscripts and sources, the ancient system of essential dignities or planetary rulerships is recovered and made available once again to the contemporary astrologer. What was nearly lost is given new power and the potential for understanding. A wealth of information is presented in a clear and concise way with many accurate charts.