I have just finished 'Deep survival' by by Laurence Gonzales.
This is a book about survival but is different from the standard fair. A lot of well known survival experts say that survival is all in the mind and that if a group of people are given the same skills and resources certain people will be more likely to survive than others.
Some people dont give up no matter what. Some people fight to the bitter end.
This books talks about mental strength and talks about strategies for keeping a clear head and survival.
Very highly recommended.
You can buy it here (amazon).
In the US
Deep Survival: Who Lives, Who Dies, and Why
In the uk/europe
Deep Survival: Who Lives, Who Dies and Why