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The Walking Dead, you see, sports the Romero kind of zombie and, beside sporting some excellent, complicated and realistic characters, manages to come up with an intriguing critique of mankind's brutality, simultaneously with a celebration of its greatest moments. After all, in any good zombie story, the zombies are not the main, let alone the only, adversary, and all post-apocalyptic worlds can be a literary social testbed. The tons of gore and gripping, at times deeply disturbing, plot can thus be considered a lovely bonus to a dark vision of humanity.
I strongly suggest you have a look at the official The Walking Dead website. You can also grab copies of The Walking Dead via Amazon