The 25-volume Advanced Research Package 2009 includes three of our most popular reference titles. 

The 25-volume Advanced Research Package 2010 includes three of our most popular reference titles. 

The 25-volume Advanced Research Package 2010 includes three of our most popular reference titles. 

This 2-volume set celebrates the rich diversity of people who proudly call themselves Americans. 

This outstanding 2-volume set examines the United States presidency and its historical importance. 

This 7-volume set offers information about animals, including their features, behaviors and habitats. 

World Book's Animals of the World appeals to students' curiosity about animals. 

World Book's Animals of the World appeals to students' curiosity about animals. 

Students with an insatiable curiosity about animals will be thrilled with the Animals of the World series! 

World Book's Animals of the World appeals to student's curiosity about animals. 

World Book's Animals of the World appeals to students' curiosity about animals. 

World Book's Animals of the World appeals to students' curiosity about animals while providing a quick source for answers to commonly asked questions. 

World Book's newly redesigned 432-page atlas. 

The 24-volume Basic Research Package 2009 includes two of our most popular reference titles. 

The 24-volume Basic Research Package 2009 includes two of our most popular reference titles. 

The 24-volume Basic Research Package 2010 includes two of our most popular reference titles. 

The 24-volume Basic Research Package 2010 includes two of our most popular reference titles. 

This unique series showcases the biographies of fascinating historical figures. 

Introduce readers to customs and traditions that mark special holidays. 

Each of the books in this set introduces readers to customs and traditions from around the world.