Answer:
There are a great many excellent books as well as websites to research your question. May I suggest:
The New Age Herbalist by Richard Mabey, published by Simon & Schuster Inc. 1988.
Holistic Herbal by David Hoffman published by Element Books 1996
The complete Book of Herbs by Lesley Bremness published by Viking Studio Books 1988
Or you could good to the quintessential Herbal:
Culpeper's Complete Herbal, by Nicholas Culpeper
My copy is from W Foulsham & Co Ltd and the book in various forms has been printed and reprinted for decades.