There are a number of publications related to thyroid disease available at http://www.amazon.com on the internet. We have purchased lots of books through Amazon Books at that address. On the NGDF web page there are several reading references, among them is Rosenthal’s THE THYROID SOURCEBOOK. This book is available for $14.40 plus shipping from Amazon Books. I did a search on the word “thyroid” and lots of books came up for purchase, some of which were very, very expensive — probably professional works — others at a price range within our budget. You might want to take a look at what’s out there.