First the good news. As the book says, “You can, with relatively few exceptions, eat anything that crawls, swims, walks, or flies.” You shouldn’t eat the livers of polar bears or bearded seals, because they may contain toxic levels of Vitamin A. And you shouldn’t eat toads, because some of them secrete poisons through their skins. And you shouldn’t eat box turtles because they eat poisonous mushrooms, and the toxins build up in their flesh. But other than that, you can eat all the birds and all the fish, and almost all the animals.
Here's the bad news. You have to catch them first. This book will teach you how to build traps and snares, and then how to skin the animals and prepare the meat. I thought it was highly unlikely that if I were stranded in the woods, I would actually remember how to tie the knots and whittle the toggles needed to make the snares. (It did say that porcupines can be kind of slow and kind of stupid. If you see one, you might be able to just walk up and whack it with a stick.)
Also, I would rather not rip open a squirrel with my bare hands. But I would rather do that than die. And that’s the point of the book. How to not die.
The plants are a bit trickier. There are many look-alike plants, where one kind is edible, but a very similar-looking cousin is poisonous. So you really have to know. And when it comes to mushrooms, just don’t. Even if you think you know. One interesting thing it says about poisonous mushrooms is that the poison may not kick in for hours or days. You may eat the mushrooms and feel fine, and then, the next day, it’s too late.
You can eat the inner bark of most trees, which was encouraging, and you can make tea out of pine needles for Vitamin C, so you won’t die of scurvy. The plant section has very detailed descriptions of the plant characteristics, and contains line drawings. For the plants I didn’t already know, I didn’t think the line drawings were clear enough for me to identify that plant in the wild.
There is an “edibility test” for plants. First, tie the plant against the tender skin of your inner wrist, and see if it causes irritation or burning. If it does, don’t eat it. Then hold the plant against your lips. Then hold a piece of the plant on your tongue but don’t swallow it. Then swallow a piece, and wait. It isn’t foolproof, but it’s better than swallowing plants willy-nilly.
I think that knowing what food sources are available in an emergency is good information to have, even if you never need to use it. And I plan to never need it. I do plan to continue learning what wild plants are edible. And, when I read the book, I kept thinking that when I do go in the woods, I ought to have at least a knife in my pocket. A basic Swiss army knife. So that is one way this book will have changed my life.
Oh, and the other bad news is that you might have to eat things you think are "yucky." So get over it.