Good herbal or botanical book?

The PDR for Herbal Medicines is a great one. check it here.... a href="http://www.amazon.com/Herbal-Medicines-Physicians-Desk-Reference/dp/1563636786/ref=pd_bbs_sr_1?ie=UTF8&s=books&qid=1202495231&sr=1-1" rel="nofollow"http://www.amazon.com/Herbal-Medicines-P…/a