"Interview" will put you through serious mental acrobatics if you let it. What is morality? Is there a fixed moral code? Were the vampires human enough to be subject to humanity and therefore certain standards? What makes us human? Also, it's a damn good read, although Anne Rice does tend to run on. There is some seriously beautiful/repulsive imagery. I loved this novel for the way it presented such great "life on the other side" questions about being human in such a user-friendly package.