World Book, Inc. Headquarters:
180 N LaSalle St.
Suite 900
Chicago, Illinois 60601
Ph: 312-729-5800
Fax: 312-729-5600
Customer Service:
Hours: Monday through Friday 9:00 AM -5:00 PM Central Time
Customer Service for Institutions and general inquiries:
US: 800-975-3250
Canada: 800-837-5365