Meditations on Violence by Rory Miller

This is a fascinating, insightful book. Miller writes with clarity about the nature of human violence in modern Western society and punctures the myth of the dojo and practiced martial arts training. It's an interesting topic in part because I (and probably you) live in a society where people prefer to ignore violence, pretend that it exists at a remove, and move blithely through the world as though it can't happen to you. Ignorance is bliss. 

You don't need to live in fear or paranoia, but a greater understanding of violent human nature is probably a good idea, not least so that you can recognize a real danger when it presents itself.

The book does not attempt to share techniques for training or exercises. Instead it does what it says on the tin (meditations): philosophical topics rooted in real-world experience. 

Highly recommended.