I'm looking for a book, some guide, that describes basically everything you could find to eat in a forest. Leaves, barks, mosses, trees, mushrooms. Does any such book exist?
It is true that there are many publications out there on the subject, yet I learned through two botany courses in college, along with a much time spent in the wilderness, that you need to be really careful in identifying edible plants from any written or pictorial description in a book. The important thing to remember is to always make your decision with caution always in the forefront of your mind.
Food for free by Richard Mabey. It's brilliant-takes you right through the seasons and loads of great recipies too! Hedgerow food is the best! Good Luck!!
Why is it that we need a book to instruct us on which plants and plant products will kill us, and which ones will nourish us?
I'm must advise you to learn about plants one at a time, get to know their parts and such to be able to id them 100 percent, if not 100 percent sure, then leave it alone!!! Get to know the poisonous plants and look a likes too, also think of the soil and water of the area you plan to forage, is it clean or polluted? Never forage near train tracks or road sides, must be at least 50 feet away from the chemicals and carbon monoxide that gets into the plants from there. Now, I recommend my favorite book, great to learn plants, its history, its uses for food, nutrients, and medicine, even has recipes for them, it's called, "Identifying and Harvesting Edible and Medicinal Plants" by "Wildman" Steve Brill He has a web site, wildmanstevebrill.com but it's not nearly as good as the book, just good for quick general knowledge. Hope this helps, have fun with it, I know I do, Peace