I need to know if I need to read number 1 to understand number 2. If so, I'll order number 1 as I already have number 2.
Also, I can't sleep.
I'd rather read a book anytime over the movie. However, after reading the books, I will watch the movie.
I only suggested the movie because it sounded like you didn't want to read the first book. I think the graphic novel is okay, but a little dry. The movie is a pretty good sum of it all.
And, if anything, just pick up the movie.