I am hooked on the HBO series, True Blood. I have read Charlaine Harris's Sookie Stackhouse series many times, it's one of my favorites. At first I didn't like the tv series during season 1 but now I think of it as being separate from the books.
Last season was exciting and surprising since it semi-follows the book. The screen play is just as good. I read recently that the director read all of Harris's books but decided to add his own twist to the story. What was once a story of Sookie Stackhouse is now a story of the people in the town of Bon Temps. He added more depth to the peripheral characters in the book, like Tara and Lafayette who died in the second book.
Next season is going to be more surprising with the abduction of Bill Compton, the vampire who is dating Sookie.