All existing entries, facts, and figures have been updated in this new, multiple-volume reference tool. Entries are based on the specific requests of librarians and educators. The result is an informative reference tool with accessible text, user-friendly design, and engaging artwork. Each topic is carefully selected to address key curriculum subjects as well as those topics of high interest to primary readers. Each entry is developed with an eye toward the key pieces of information young readers want and need to know. This new encyclopedia includes 90 new entries, including one for each state and 12 alphabetical volumes.