Book on actual survival food

[Carol]

Hey guys,

I've been checking amazon for a while now and I can't seem to find a proper book on survival food. There's lots out there on edible things in the outdoors, with recipes and such, or on what to store in your pantry in case of disaster.
But I am more looking for something that shows things that are edible in case you're say, lost in the woods or the like, where it's more about finding whatever is edible and will sustain you and not about taste or how pretty it looks on the dinner plate, whether that's worms or tasteless but edible plants or whatnot.

Does anyone know any books I can have a look at? Preferably something that's specifically about food and not an all round survival guide.