Very well arranged, -by alphabetic sections for all diseases in soigner- and then by ranking oils themselves, it is very easy to navigate. Furthermore, there is everything in it ... REALLY Provenance oils, how to recognize true copies, how to use alone or mixed etc etc.
I have several books on this subject and I think that here is the clearest and easiest to use: From far away. I am the User frequently and I always find what I seek. I highly recommend this really done better than others certainly best known work, but not always so well made and often a much higher cost.