Food For Free is a book by Richard Mabey on foraging. I got the pocket-sized edition which is great for travelling around with.
It contains descriptions of loads of different plants you will find it Britain and each one comes with an illustration and a photo. It describes what it looks like and what you can do with it. All good stuff.
On the negative side, it is very insistent that you use a real identification guide, which it claims this is not. I felt that distracted a lot from the purpose of the book. Why make it pocket-sized for example if you’re not taking it into the field?
It is also arranged alphabetically whereas I felt grouping similar plants together would be more useful. If I see a plant I want to be able to find that section and work out which one it is. That way also has difficulties – how do you find the section you want if you already know what it is, and how do you judge what is similar? However, on balance I think the trade off would have been worth it.
It does however address any concerns you might have that you could accidentally pick something poisonous by telling you it will probably be fine. I feel much better after that…