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Great stand-alone graphic novels.
My birthday is coming up and I thought I'd use it as an excuse to pick up a few books from my ever-generous parents. I'd like some suggestions for good graphic novels where I won't have to buy a million other books to finish the series (Sandman, Preacher etc). I'm happy to consider superhero stuff that isn't too reliant on reading tons of other proceeding comics.
So far on my list is Blankets by Craig Thompson...