You need to read the book and then you need to assess where you're at as a human because they're different. And what's nice about stun guns is they're legal. Like like me, I don't carry food for 72 hours, not doing it. So be careful that one. What else do you cover in this pistols? You cover pistols, you cover knives, talking about tactical knives versus survival knives, hybrid models,. dude, get this book is good information, non lethal.