Thea Stilton's group The Thea Sisters travel to Italy for a ballet competition and try to uncover the group who is plotting to rig the contest. Interest Level: 3-6 Reading Level: 5.3 ATOS Book Level: 5.3 AR Interest Level: MG AR Points: 2 AR Quiz: 157733EN Reading Counts Level: 4.5 Reading Counts Points: 5 Lexile Measure: 740.