To an experienced, and or practicing herbalist this book has a lot of good information as to dosages and other items. I would recommend this book to anymoderate to advanced student of herbology. If you are a beginner, or justcurious, then there are farbetter books out there for that purpose. This book is not a primer, or an introduction. As a side note, I must state that thebook "Back to Eden" by Jethro Kloss is a source ofa lot of the material in Santillo's book. Mr.Santillo amplifies a lot ofthe material from Back to Eden and catalogs itbetter, so if you have or plan to get Back to Eden, then this book should be a definite companion to it. And vice versa, Back to Eden fills in alot of the items Mr. Santillo insufficiently covers. I say if you're gonna buy one, get the other. Together, they make a wonderful, reliable foundation of knowledge to draw from regarding herbology and natural living.