This reading list is a group of books I believe will help you better yourself in both areas of self-defense with a firearm. Firearm proficiency as well as mindset. Mindset is an important aspect of self defense. If you can't get your mind right you will never perform when needed. There are no links to click as we do not get a commission for selling any of these items.
Surgical Speed Shooting: How To Achieve High-Speed Marksmanship In a Gun Fight-Andy Stanford
Principles of Personal Defense-Jeff Cooper
Violence of Mind-Varg Freeborn