Describes the early life of William Wrigley, the businessman whose use of premiums in marketing made him a leader in the chewing gum business, explains how he built his company, and discusses his later life and ownership of the Chicago Cubs. Interest Level: 3-6 Reading Level: 4.4 ATOS Book Level: 4.3 AR Interest Level: MG AR Points: .5 AR Quiz: 142386EN Guided Reading Level: P.