Lavender - the grower's guide by Virginia McNaughton has been an invaluable tool in my lavender adventure. I stumbled across it one day in a book store, and it turned out to be an awesome find.
Virginia McNaughton discusses the many different varieties of lavender as well as its history. There is also a whole chapter on the botany of lavender, which I particularly like. I have referred to this book time and again over the last year as we've worked to get our lavender farm established.
Click here to visit Lavender Downs, Virginia McNaughton's website.