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Every single article from the 22-volume print edition of the 2011 World Book Encyclopedia are included plus eighty years of archived articles in World Book's online resources. And with automatic Article Updates you'll always be up to date!

New Articles. Every year, more than 4,000 articles are added or updated.
For the 2011 edition that includes articles from Michael Bloomberg to Alicia Keys,
and Snoop Dog to The Lion King.