The astrology of change: Horary astrology and its humanistic applications

From back cover: Horary Astrology is the "newest" and fastest growing branch of astrological study. Similar in theory to the principle of the I Ching, the Horary (literally "of the hour") chart is cast for the time and place that a specific crisis arises in the life of the individual and is used to uncover the potential for growth which may be found at the heart of any personal problem.