The DASH diet is well documented online. Ordinarily I would say that the price of the book is justified by having the information brought together and organized, but this book fails so very badly at that job. The information is in fact poorly organized, surprisingly so. The book is in every sense unappealing, with bad typography, irritating language and a feeling of having been thrown together with no thought or effort. As for the diet itself, it works wonderfully and can play a big part in your fight against hypertension. But this book is a terrible place to learn about it.