I have a brother in the army. He's served in just about every bit of nastiness around the world in the last 15 years or so. The most common complaint I get from him on behalf of his troops, is that it often gets boring without the amenities of home, and the only easily portable entertainment, reading material, is hard to come by.
So, periodically, my wife and pack up a big box full of used paperbacks and magazines and mail them to my brother to pass around to his soldiers. We send our own, if we have them and are no longer reading them, otherwise, we go down to the local public library and take their old books and magazines... Sometimes we buy them from the library cheap, othertimes the library has donated them to us.