"The true story of Ivan, known as the Shopping Mall Gorilla, who lived alone in a small cage for almost 30 years before being relocated to the gorilla habitat at ZooAtlanta"--Provided by publisher. Interest Level: K-3 Reading Level: 3.9 ATOS Book Level: 3.7 AR Interest Level: LG AR Points: .5 AR Quiz: 169750EN Reading Counts Level: 3.2 Reading Counts Points: 1 Lexile Measure: 680 Lexile Code: AD (Adult Directed).