Rescued from the gallows in 1850s London, young orphan and thief Mary Quinn is offered a place at Miss Scrimshaw's Academy for Girls where she is trained to be part of an all-female investigative unit called The Agency and, at age seventeen, she infiltrates a rich merchant's home in hopes of tracing his missing cargo ships. Interest Level: YA ATOS Book Level: 5.1 AR Interest Level: MG AR Points: 11 AR Quiz: 136602EN Reading Counts Level: 5.2 Reading Counts Points: 17 Lexile Measure: 680 Lexile Code: HL (High-Low) Fountas & Pinnell: Z Iowa Teen Award 2013 - 14.