I recently picked up the book "Sucker Punch: the art of the film". And I gotta say I highly recommend it. The book has about 250 pages of movie posters, lots of concept art, sketches and movie stills. Its not a "making of" book or anything like that, just art (none of that pesky "reading" stuff"

). While its debatable how good the movie actually is, visually, I think its amazing. Its one of those movies that you see something new every time you watch. Nazi zombies, orcs, dragons, giant robot samurais, its all good stuff. The posters for the film heavily inspired my first Wonder Woman pic. If you're interested in picking it up:
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I'll be glad to check this book out just to learn that much more about its art--once I'm finally not broke.