Over 400 entries describing what essential oils and blends others have used for various health concerns. This includes which oils are best, how they have been used and the testimonials and experiences of others. 9th edition - easy-to-use reference guide for essential oils users. 16 more pages of valuable information on new oils including Jasmine, Petitgrain and Spikenard! We also added new blend updates, health concerns, glossary terms, charts and much, much more!