Review (5/5): A Must Have if you use oils at all.
I order these all the time, unfortunately they are always out of stock but that just proves how awesome this book is. Being a Doterra Wellness Advocate I include one of these for first time orderers who put in a good sized order. I also have one in my purse, at home, at work and reference it all the time for a quick guide. I love how you can look at either your symptom or the oil itself. Very easy to use and understand.