You might want to start with "Alvin York: A New Biography of the Hero of the Argonne." It is available on Amazon. The "Gift of Fear" by Gavin De Becker is good also. "Facing Violence: Preparing for the Unexpected" by Rory Miller teaches how to avoid conflict and what to do when it is unavoidable. 

Shame you feel a need to compare shooting with smoking a narcotic but only you know the level of truth you are seeking. 

You didn't know that MLK owned and carried guns for his protection? Check out "MLK and His Guns: at Huffpost. Or that the NRA helped create and teach the Deacons for Defense, which provided black clergy and their people in the 1950's South how to defend themselves with firearms. 

There are vast depths to the issues of firearms that you are not even aware of. Cutting yourself off from learning about them or only using others who are also ignorant as your guide/teacher is a choice you make. Just don't wonder why when people who know better make fun of you when you post.