Charlie and his friends unite to rescue Ollie, a boy who was turned invisible and made to live in the attics at Bloor's Academy more than a year ago. Interest Level: 3-6 ATOS Book Level: 4.9 AR Interest Level: MG AR Points: 10 AR Quiz: 78185EN Reading Counts Level: 5.3 Reading Counts Points: 15 Lexile Measure: 720 Guided Reading Level: T Fountas & Pinnell: U.