Copyright law still valid?

Is the copyright law still valid in the digital age?
Editor's note: As Google and Amazon prepare to digitize books and hawk them online, are they violating the copyright law? Listen to what Wharton professors say. THE latest frontier in the digital content revolution — efforts by Google, Amazon and others to turn millions of books into bytes that can be accessed no matter where the reader is and sold by the page and easily searched — could redefine copyright law and change the way knowledge is shared around the world.  

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