I love this book..."Healing Home Spa" by Valerie Gennari
Cooksley, R.N. You'll love it too! It encompasses both preventative
and healing remedies/recipes from A-Z. It also includes a chart of
blending resources for a variety of essential oil
preparations/dilutions.
(Another answer) - my favorite aromatherapy book is The Complete
Book of Essential Oils and Aromatherapy. It contains info about the
specific oils used, and a wide variety of recipes for everything
from bruises to baldness and even making your own shampoo. You can
get a used copy for about 15 bucks.
http://www.amazon.com/Complete-Book-Essential-Oils-Aromatherapy/dp/0931432820