With more than 360 entries, this encyclopedia covers 200 conditions and 74 essential oils as well as recipes and formulae. This has to be one of the most thoroughly researched books written on aromatherapy. 384pp.

Patricia Davis is an aromatherapist with many years experience in the field. She is the best-selling author of books including: Subtle Aromatherapy, A Change for the Better; and Astrological Aromatherapy.