I LOVE Rosemary Gladstar's books! She is a wealth of information. One day I would love to visit her retreat and farm.

For the SAFE thing, I know some herbs don't mix well especially with lye soap recipes, but they may be good for the melt & pour soaps.

I also have read and researched so much about EOs- and I too, get conflicting information- it really is annoying at times. I generally use Rosemary's info or the Young Living website for any questions I have. Those two seem to be the most trustworthy to me.