Just putting out my current reading list. These are books that I have read and gotten significant value. Feel free to add your favorites!
In the Gravest Extreme - Ayoob
The Cornered Cat - Jackson
Gunfight - Nance
Combat Shooting - Ayoob
The Law of Self Defense - Branca
Meditations on Violence - Miller
T.A.P.S. - McNamara
Warnings Unheeded - Brown
Violence of Mind - Freeborn
Effective Defense - Hayes
The Book of Two Guns - McKee
Gunproof your Children - Ayoob
Sharpening the Warriors Edge - Siddle
Straight Talk on Armed Defense - Ayoob and Others
Stressfire - Ayoob
I am sure there are more, but this gives us a start.