It's a classic aromatherapy textbook, updated with the latest research results. The first edition was released in 1990. The book describes the medical, alchemical and spiritual development of this art. It shows how to use proper plant essences in the care of beauty, for purification, for therapeutic purposes, as well as for massage, aromatic baths and rituals. Explains the construction of the olfactory system and its impact on our moods, emotions and sexuality. It describes the biochemistry of essential oils and their effects on the physical, energy, emotional and spiritual levels. It discusses different methods of extraction and ways of combining them.