When researching your herbs, always use at least 3 books written by herbalists who actually practice herbal medicine on themselves and others. Here are some of the books that I own and use, which have been collected over the years and recommended by trusted sources. Check back often, as this list will be updated periodically.
NOTE: I apologize for the hassle of having to click again, Amazon.com does not allow me to put the link to my list in a private document/paid product. 🙁