Should you wish to have some good dependable books on Herbalism and magic, may I suggest my old friend and teacher? Paul Beyerl.
He also has the Rowan Tree Church up in Seattle WA and the Hermit’s Grove. He has one of the longest running pagan publications called the Unicorn that you can subscribe to and I write for.
He also teaches fantastic classes in Astrology, herbalism, tarot and other stuff I’ve taken and forgotten.
Anyway here are some of my favourite books from Paul:
The Master Book of Herbalism:
The Herbal Magick Compendium
The Holy Book of Devas – the Secret Mythologies of the Herbal World
The Wiccan Bardo