Yeah, the book vampires were much more fleshed out. In the movie they were just barely-sentient beasts, primarily running off of instinct. They only seemingly had some basic higher-level reasoning. His primary struggle was surviving while surrounded by bloodthirsty animals.

In the book, they were a full blown society with their own culture. When the people around him changed, he was suddenly a stranger in a brand new culture. The point was that in the old society, vampires were the thing that went bump in the night. But in the new society, he was the monster that parents told their kids to watch out for.