AAAARGH! Now I want to KILL things!

Okay, so I'm reading this rather splendid lit crit book on Diana Wynne Jones; it's a collection of essays and I'm enjoying them all when I happen upon an essay titled Good and Evil in the Works of DWJ and JKR. "Oh goody!" ejaculate I and plunge into it.( GAH! No, there are NO spoilers for DH, I could care less )