I spent two years in Helmand, Kandahar and Kabul A-stan in '08-'09. I hear ya about the shortage of books. I solved that problem by writing to the folks who run our local library book sale, and within weeks I was getting more boxes of books than I knew what to do with.
As far as survival books, our semi-annual book sale is coming up

http://www.booksale.org/sale/sale.php

and there is a camping/ outdoors section. I can hit the sale on its last days and get you some stuff, if you'd like to give me a list of your preferences.

No need to return them; time for me to pass along the same courtesy that others did for me.

Stay safe over there.