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PHILADELPHIA (AP) - It's the comic book cover that captures the grim visage of an older, wiser Batman.

The 1986 pen and ink creation - drawn by writer/artist Frank Miller - that is the cover to "The Dark Knight Returns" No. 2 will be sold next month in Dallas by Heritage Auctions. It's the first cover from the "Dark Knight" miniseries to be sold and is expected to fetch more than $500,000.

Heritage vice president Todd Hignite says Miller's story for DC Comics "altered the direction of comics."

Also up for sale is a 9.2-graded copy of "Batman" No. 1 from 1940. A similar copy sold for $850,000 in 2012.

The record price for a comic book remains "Action Comics" No. 1, which sold for $2.16 million in 2011. That featured Superman's first appearance.

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