One of the classic texts of the modern survival movement, Tappan on Survival, is back in print and available from Paladin Press. In my opinion, there's some good information contained in ToS although some is a bit dated, and the financial collapse that Mel Tappan predicted didn't come about. (Of course, history isn't over, so ....). ToS is worth getting if you're building a survival library.
Incidentally, Jerry Pournelle wrote the foreword to the first edition. You may be familiar with his work as a longtime columnist for Byte, or his science fiction novels, including my favorite end of the world story, Lucifer's Hammer, coauthored with Larry Niven.