Fetrow and Avila, both of whom hold doctorates in pharmacy have prepared what I consider a "quick and quotable" reference for my work as a pharmacist. I appreciate the black box highlights for each herb entitled "what the research shows". This provides the caveats I must consider before recommending (or not recommending) an herbal supplement. Don't look for additional fluff or color plates in this book; there are none, just easy to find A to Z herbs with references. Worth the price for any healthcare provider's toolbox.