I also learned a lot from the HBO series on addiction, including imaging that showed brain changes with addiction....
Thanks for the article lillamy.
There is a great book (okay I have not finished yet) by David Linden called "The Compass of Pleasure" that I am enjoying also about the brain (he also wrote The Accidental Mind which I have not read. It is about the pleasure center and reward system in the brain. Really interesting stuff, and it is not a heavy read though I learn a lot.