The Fragrant Heavens by Valerie Wormood.
A beautiful book for spiritual aromatherapy, one of my favorites.
The Complete Guide to Aromatherapy by Salvitore Battaglia.
This is a MAJORLY detailed textbook, not for the dabbler.
The Directory of Essential Oils by Wanda Sellar.
I frequently reference this book in conjunction with other books, it is a great directory.
Aromatherapy A Lifetime Guide to Healing with Essential Oils by Valerie Gennari Cooksley.
A great beginners book with lots of recipes especially for skin care. Includes some recipes for pregnancy and childbirth.
Associations and Resources
National Association of Holistic Aromatherapy
Bottles and Containers
Stores: Big Lots, Walmart, Cost Plus
Follow Your Heart