"Angels And Demon's" was actually written before "The Davinci Code" and I thought it was a much more intense, thrilling, and entertaining book than the Code. This should bode well for the movie, once again starring Tom Hanks and being released in May of '09.
TrailerAddict.com gives this description of the film:
Harvard religious expert Robert Langdon once again finds that forces with ancient roots are willing to stop at nothing, even murder, to advance their goals. Ron Howard again directs the film. When Langdon discovers evidence of the resurgence of an ancient secret brotherhood known as the Illuminati -- the most powerful underground organization in history -- he also faces a deadly threat to the existence of the secret organization's most despised enemy: the Catholic Church.
When Langdon learns that the clock is ticking on an unstoppable Illuminati time bomb, he jets to Rome, where he joins forces with Vittoria Vetra, a beautiful and enigmatic Italian scientist. Embarking on a nonstop, action-packed hunt through sealed crypts, dangerous catacombs, deserted cathedrals, and even to the heart of the most secretive vault on earth, Langdon and Vetra will follow a 400-year-old trail of ancient symbols that mark the Vatican's only hope for survival.