Instead of spending a carefree summer exploring downtown Boston with best friend Ollie, thirteen-year-old Moxie must solve a famous art heist in order to protect those she loves from her ailing grandfather's gangster past. Includes facts about the 1990 Gardner Museum art theft. Interest Level: 5-8 Reading Level: 4.9 ATOS Book Level: 5.3 AR Interest Level: MG AR Points: 9 AR Quiz: 162674EN Reading Counts Level: 4.6 Reading Counts Points: 15 Lexile Measure: 760.