The SAS Survival Handbook: How to Survive in the Wild, in Any Climate, on Land or at Sea,

This leading survival manual is authored by John Wiseman, who was a professional soldier for 26 years with the British armed services. John was the survival instructor for the elite unit of the British Army, the Special Air Service (SAS). His book would be an excellent addition to your personal library. Gives a great simplified overview to many subjects, but should be supplemented with edible plant handbooks plus several of the recommended books on primitive living skills, if you really want to know how to do some of the things that will count most if you someday find yourself deprived of access to modern conveniences for an extended period of time.