Here is a list of books that I feel are beneficial for armed citizens defensive mindset and training.
With Winning in Mind 3rd Ed.
by Bassham, Lanny
The Gift of Fear
by de Becker, Gavin
Facing Violence: Preparing for the Unexpected
by Miller, Rory
Combat Shooting with Massad Ayoob
by Ayoob, Massad
In the Gravest Extreme: The Role of the Firearm in Personal Protection
by Massad F. Ayoob
Combat Focus Shooting: Evolution
by Pincus, Rob