Watchmen Graphic Novel

I went out last night to watch Watchmen and I can't understand the story fully. My friends who are big fans really liked it but said that the comic book is better. Thus comes by current need to read the Watchmen Graphic Novel which I want to download online. I've been searching for it and I hope I can soon find a website that will give me exactly what I need. In the meantime, I'm planning to see the movie again but this time I think I'll just watch Watchmen online.