In the Gravest Extreme: The Role of the Firearm in Personal Protection written by Massad F. Ayoob, ISBN 0-936279-00-1.
Mr. Ayoob is a well-known authority on the use of firearms and confrontation. This book, albeit somewhat dated (21st printing of a 1980 copyright) by today's standard, has some very useful discussion of the who, what, why, how and when of personal defense with a firearm. Also, his style of writing is quite readable.
In my opinion, the discussion about do not give chase, do not instigate, be judicious in the application of preemptive strike, to be aware of and current on the local laws applicable, firearm safety, and leave police work to police personnel is the most important treatment in this book.
Next in importance are the discussions of caliber, recoil, home defense scenarios and the general use of firearms for defense in any number of scenarios is near as critical as the former list.
This book (about 135 pages in a roughly 5-3/8" X 8-3/8" platform) covers the many aspects of firearm use, especially with regard to personal defense, very well and from the viewpoint of someone who knows. That knowledge from many years in LE, instructor and student of the topic.