I am going to withhold judgment for now, but will note that when I signed up for the ebook I got an email with a confirmation link which said I would be redirected to a download site, but once I clicked the link I was simply redirected to a page which said thanks for subscribing to Kevin Whitsett and no download link.  If I do end up getting the book and it is purely informational with no affiliate or sales links, then there is likely not a problem.  However, if the "free informational book" or any subscription which I did not ask for contains solicitations for products or sales links to products, then there is a problem.

In a nutshell, the 18 page ebook looks like something written by a mainstream agent  - certainly not by someone well versed in natural and herbal health.  Whether well intentioned or not, the book is full of advice about relying on the FDA, FTC, etc., making sure supplement makers follow the Pharmaceutical GMP, etc.  Not saying that there isn't SOME good info, but I am saying that it is a book maim-stream medicine would like.

The evident purpose of the book, btw, is to get you to sign up for a subscription for future mailouts, though that is not made apparent by the "free ebook" offer.  I don't know whether or not they are commercial in nature, but don't intend to find out based on what the book has to say. 

Here is the reply I just sent to the author after he directed me to the correct download site:

Thanks for directing me to the download site.  As a natural health researcher and writer myself I must say that while your book appears relatively well written and put together, you have much to learn when it comes to natural health - as opposed to the mainstream view of natural health espoused in your book.

8 Ingredients in Supplements That Should be avoided like the Plaque

Chaparral
Comfrey
Country Mallow
Kava
Lobelia
Germanium
Colloidal Silver
Yohimbe

Good grief - colloidal silver and lobelia are two of the very best supplement items in existence.  And I have no problems with most of the other items either, so long as they are taken in appropriate amounts (but not avoided entirely!).  It appears that you are mostly relying on maim-stream medicine disinformation.  BTW, that should be plague instead of plaque.
 
FTC? FDA? Pharmaceutical GMP?
 
Your book strikes me as one which was written by someone from maim-stream medicine.  It certainly was not written by someone who is well versed in natural/herbal health.  You could learn a lot at places like CureZone.
 
Please take me off your list!