It depends. If I watched the movie first, I 'm not going to read the book. If I read the book first I will not watch the movie. But I prefer to read. When I don't have enough time I have no choice but to watch the movie version. The book is more complete and detailed compared to the movie. Movie producers most of the time omit things from the book. This is, I guess, for them to fit the story in two hours. One thing, reading books will enhance your imagination while watching only damages your eyes.