Battling sharks in the ocean? Want to know if that snake in your tent in poisonous? Download the US Army Survival Handbook from Equipped.com. 19 chapters and 8 appendixes are available as free pdfs. Situations include "Cold Weather Survival", "Expedient Water Crossing", "Food Procurement", and many more. An updated, HTML-only version is also available.
As for you bleeding-heart peaceniks, don't be turned off by the fact this books comes from the US Army. It's just a survival handbook.