I got two of the best that cover some of the same stuff but in their own ways.

Tom Browns Field Guide; Wilderness Survival
he tells stories of how he learned and what he learned, mistakes along the way and more. Very traditional and basically works on survival using a knife and some string or rope as your base tools.

How To Survive Anything, Anywhere by Chris Mcnab
more of a situational andlocation type book which covers everything from earthquakes to floods to volcanos. Decent read but more a reference book than a read through. I tend to read a chapter now and again but never straight through.

Both cover basic plant life with descriptions and drawings.

Also I suggest learning to use a compass. A GPS is nice but there are many reasons you don't want to rely solely on one, a compass and map are infallible and you won't have to worry about a tinfoil hat if you are on the run for any reason