I keep one of these on my bike at all times. Possibly more for novel use than practical (but good for any apocalypse, horror movie reenactment or just plain interesting reading at a doctors office). After all, you never know where or how far you might break down from civilization (or when the Zombie Apocalypse might hit). For $6, you can't go wrong!
    
http://www.amazon.com/SAS-Survival-Guide-Survive-Collin....