To build on the body of knowledge accumulated through the ages by medical and psychological astrologers - Leoni Hodgson saw a need for a book such as this:
- A Medical/ Psychological Encyclopaedia that includes medical definitions.
- Acknowledgment of the psychology - body connection; of an emotional disturbance (primarily) - and the appearance of a related physical disease.
- The presentation of health formulas, in which signs and planets that represent a disease, are clearly distinguished from those that represent the mind and body parts affected.
- To demonstrate how the formulas work, disease patterns from charts have been included - and associated birth chart data, so readers can erect charts and see for themselves what is being explained.
- The inclusion of Esoteric and Eastern spiritual notions and terms. This expands exoteric astrology into wider fields of knowledge.