Several times over the years I have picked up used copies of Jack O'Connor's books, "Complete Book of Rifles and Shotguns", and "The Rifle Book".

I have passed these books on to my young nephews and other young people just getting interested in guns and hunting.

https://www.abebooks.com/servlet/SearchResults?sts=t&an=jack+o%27connor&tn=complete+book+of+rifles+and+shotguns&kn=&isbn=

"The Rifle Book" is a little more popular, and a bit harder to find.

I read these books cover to cover as a teenager. I found that whenever I followed the advice given in Jack's books, I never went wrong.
I believe that 90% of what he wrote is still as true today as when he wrote it.

Nifty-250

"If you don't know where you're going, you may wind up somewhere else".
Yogi Berra