Depending on how deep you want to get into Aromatherapy, there are several great books out there: The Essential Oils Handbook is a great starting point and it also offers recipes and blends.
If you want to dig deeper....
Practice of Aromatherapy by Jean MD Valnet. A medical doctor and practitioner of aromatherapy for more than 30 years, Jean Valnet is regarded as the father of essential oil therapy and one of its foremost authorities. In this classic manual he provides detailed evidence for the efficacy of plant medicine – nature’s most time-honored method for treatment of illness and relief of pain. Valnet’s thorough research, based on his long career of treating patients and observing the effects of plant essences on a wide range of conditions, bridges the gap between the ancient tradition of healing with herbs and advances of modern medicine.
More complete than any other book on the subject, The Practice of Aromatherapy covers 40 essences in detail, providing: Classification of plant medicines and scientific explanation of how they work. Detailed indications for internal and external use of plant essence, extracts and tinctures. Case histories and information on gathering and conservation of plants. Formulas for prescriptions, medicinal wines and elixirs. Dr. Valnet makes an impassioned plea for curtailing our use of dangerous chemical therapies and antibiotics, offering demonstrable proof of the vital power of plant medicines to prevent and heal disease and strengthen the immune system.
