Meditations on Violence by Rory Miller is a great book. Rather than discussing specific techniques, Miller discusses the intellectual and emotional components of violent encounters. He has spent over a decade working in prisons, so he certainly has extensive experience in the area of violence having been in hundreds of violent encounters with some of the worst criminals on the planet.
And neither is it a dry, boring read; I read most of it in a single sitting, and only stopped because I needed to get up early the next morning. Useful and entertaining; I strongly recommend it. The only downside is that every now and again I read a paragraph and just sat there wondering what he was trying to say, but I have the same problem with my own writing sometimes so I won't hold it against him. :-)
PS. Miller also has an interesting blog.
