We have many types of reference books available:

Encyclopedias of the United States
Scholastic Encyclopedia of the U.S. at War
Scholastic Atlas of the U.S.
Scholastic Dictionary of Idioms
Scholastic Books of Lists
Children's Encyclopedia
Student Atlas of the World
Spanish-English Dictionary
Visual Dictionary
Kids Almanac
First Atlas
Dictionaries
Presidents
Thesaurus'
State flags
Altas'