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The World Book Encyclopedia 2010. Pre-order now for holiday delivery.

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The Advanced Research Package, our most popular reference suite.

World Book has the products you trust to help your children excel. World Book learning and reference products are written by experts.

This 25-volume package includes the World Book Encyclopedia 2010 Universe Binding, World Book Atlas, and World Book Dictionary.

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The World Book Discovery Encyclopedia is ideal for introducing important research skills to young learners and visual learners.