I guess the question now is how many books can you afford?
I remember a book that I read in middle school, it wasn't exactly a guide on how to survive, but from what I remember, most of the survival skills were more or less servicable techniques. It's called Hatchet, I cannot recall the author though. It's about a boy named Brian who is stranded in Alaska after a plane crash, and he manages to survive until he gets rescued because of a survival hatchet he got from his mom as a gift. It was a good read for me at about that age, but it is definitely a story, not a survival guide as much.
