War is a Force That Gives Us Meaning
by Chris Hedges
This is one of my favourite books for explaining the emotional aspects of why people are drawn to violence. It looks at the addictive quality of war and terrorism. I have seen that, when they begin their careers, terrorists often believe that they are making the world a better place. But over time violence can become addictive, as Hedges makes clear. One mujahid even said to me, I am as addicted to jihad as you are to writing!