speaking of books and the info in them..some tips are timeless like making a shelter from a small tipped over pine tree or the basic's for a pocket kit--matches,candle,fish hooks and so on but in a pocket book with that good advice,more of a thin 35 page guide,by Tim Kneeland who was a survival instructor back in the 80's i found this advice.
backpackers and the like should NOT carry PLB's. known as ELT's back then--emergency locator transmitters--because it would jeapardize the reliability of a aviation and maritime rescue tool.