Download Watchmen Graphic Novel Online

I want to see and download Watchmen Graphic novel online for free because I did not understand the movie clearly. I hope I can find websites where I can view the Watchmen comic so I can follow the plot of the movie when I watch Watchmen online by next week. This multi-awarded story is now the best movie to watch this weekend that's why I want to be able to participate in conversations at the office by Monday. Do you know where I can do this? Thanks.