Broadly, I also recommend “ON KILLING REMOTELY: The Psychology of Killing with Drones“ by Wayne Phelps. It is less “academic” but a worthy read.
This is a good book that goes into a lot of what the RPA world experiences. There are some things that I was surprised to read in the book as I didn't realize they have been declassified. And, unlike some other VMU COs, Lt Col Phelps has the ability to put ideas to paper without sounding too emotional.
Definitely one of the better books to read if anyone is interested in what goes on in the RPA/drone/UAV community.