Julia and Derek Parker are two of the most highly respected astrologers worldwide. Julia trained with the Faculty of Astrological Studies in London, while Derek's interest in the history of astrology led him to write a book on astrology in the modern world. They wrote The Compleat Astrologer, selling millions of copies worldwide.

The best-selling husband and wife team have since published over 50 books on astrology and dream interpretation. They live in Australia, and broadcast and lecture on astrology throughout Europe, Australia, New Zealand, and the US.