Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The classic herb reference

I am a professional horticulturist who provides advice to commercial growers. This is the first book I recommend to anyone who is considering growing herbs commercially. It has been around for a long time and revised a time or two. It is not perfect (the perfect herb book doesn't exist yet), but if you are building a herb library, this book deserves a place there.