I have the large "The Complete book of outdoor survival" by J. Wayne Fears.
He spends a lot of time talking about shelter, fire, water, because that will save your life the quickest. He also spends some time on simle home made survival kits, for different senerios. He does not go into great detail on eatable plants and such because it will probably not come into play in the normal 3 day survival window (meaning most people are found in 3 days), but he does give some good info on plants and animals, for food. A good Read IMHO!

I would imagine the pocket version is a lot of the same good info.