Last year when I was hit with a very bad sinus infection for the whole month of November, a former co-worker of my husband's sent us some sample essential oils to try. These oils were of therapeutic grade and high quality. They actually worked so well that we decided to purchase this large book, which is considered a reference guide.
This book was originally written to go along with the Young Living Essential Oils product line but can be used with any therapeutic grade essential oils on the market. Of course not all oils are the same and knowing which brand works for you can take some trial and error. There are some that are very low quality and the way you know is that they simply don't work on your body. Take for example "Lavender Oil". This plant is grown all over the world and depending on how its farmed and where it's from, it can mean the difference in the potency of the plant and its oil that gets extracted for therapeutic uses.
This book is broken down into categories based on pure essential oils, "oil blends" (which are oils that are combined together for specific health needs), and then alphabetically by symptom or disease. There is an index in the back too. Most oils can be used alone or they can be combined together. I sometimes combine oils that work well together and they worked for my sinus problem and for my allergies too.
The front of the book shows a reflexology chart too that helps Practitioners using essential oils refer to placement on the feet. It's useful too to us regular folks. It's written in an easy to understand format so that you can apply these oils yourself. It will advise you to use what is called a "Carrier oil, which is either almond, coconut, olive oil or many other light oils that are used to blend or mix some of the very potent plant oils so they don't burn your skin". But not all oils need a carrier to dilute them.
The book is spiral bound, which makes it easy to lay flat while you read it.
When it comes to learning about essential oils and you realize that the Romans and Egyptians used them and that the Bible has many references to oils even being use to wash Christ's feet and given as a gift to Him as an infant, you realize that the pharmaceutical industry took over God's plan for us to use the plants He put on this earth for us to use in healing our bodies. So whenever we are able to, we try the essential oils and so far they do work and this book really helps in knowing which ones to use.
Essential oils are even used in cooking and can be used in drinks. For example, lemon and the citrus oils are pure enough to drink or use in cooking. Just like the rosemary, oregano and other oils. Of course they are stronger than the dried loose spices you buy in the store so you don't need to use more than a drop or two. They are just great.
I highly recommend this reference book.
note: I am not a physician, practitioner or claim to know how to heal people. This book does not make claims either. But it is a great reference book to use for anyone wishing to try essential oils.