This classic, which has sold over 600,000 copies to date, offers a guide to astrological history, legend, and practice. This book is now fully revised, updated, and translated for the first time into Spanish. Its simple computer-accurate planetary tables allow anyone born between 1900 and 2100 to pinpoint quickly their sun and moon signs, discover their ascendants, and map out the exact positions of the planets at the time of their birth.