There are a lot of foraging books on the market, so what makes this one stand out? One of the biggest distinctions is that it focuses on forty plants that are good for food. Not medicinal plants (although some of these might be both) but FOOD plants. When your goal is to find things to eat, it's helpful not having to weed through dozens of plants that are safe to consume and medicinal but not particularly great for food. Not only are these forty plants TECHNICALLY edible; the author has emphasized plants (and part of those plants) that are actually desirable for eating. She's honest about it when certain plant parts are rather gross even if they're technically consumable.
The book is also a beautiful one, with many full-page photographs and plenty of additional full-color photographs to make identification of the named plants easy. (You might be surprised by how many foraging books have lousy pictures.) There's clear, conversational discussion of the identifying characteristics of each plant and how to distinguish it from similar plants or "lookalikes."
The author has not shied away from wild edibles that have toxic -- in some cases HIGHLY toxic -- "lookalikes." That will be a plus for some people and a minus for others. If you're not comfortable foraging for foods that look similar to toxic plants, it's easy enough to pass over those; the text has made it clear when this is an issue and when it's not.
It's also helpful that the book is divided by environment. Sections include "Wild Edibles that Grow Just About Everywhere," "Green Weeds of Sunny, Disturbed Soil," "Sun-Loving Trees & Shrubs," "Edibles from Dappled Edges & Shady Places," and "Plants that Like Wet Feet," so you can quickly and easily identify WHICH plants to be looking for in the particular area you find yourself in. A final section discusses "preserving the harvest," and addresses options such as drying, freezing, and canning, since most of us don't want to have to consume the entire season's worth of a given plant within a single week's span.
Overall, I found this to be a very PRACTICAL book, as if a knowledgeable friend were helping me do the actual work of foraging, preparing, and/or preserving the harvest, not merely a reference book that gives me head knowledge I still lack the practical information to use.