Complex sentence: Universal Studios bought the film rights to the first three books of "The Saga of Darren Shan" and combined them to make a single movie, "The Vampire's Assistant", released in the US on 23 October 2009.
Split into simpler sentences: Universal Studios bought the film rights to the first three books of "The Saga of Darren Shan" and combined them to make a single movie. The first movie is called The Vampire's Assistant and was released in the US on 23 October 2009.