The perfect essential oil reference guide for either the novice & expert oil user. Fully updated with the latest research & expertly written to help you quickly find the perfect oil or oil blend. This essential oil reference guide provides easy to use steps, usage tips, and advice along with in-depth, expert-level knowledge. Now, updated with the 2017 dōTERRA yōu convention oils, and 16 pages of essential oil education content. *Does not contain the Yoga Collection.