When sixteen-year-old orphan Tessa Gray's older brother suddenly vanishes, her search for him leads her into Victorian-era London's dangerous supernatural underworld, and when she discovers that she herself is a Downworlder, she must learn to trust the demon-killing Shadowhunters if she ever wants to learn to control her powers and find her brother. Interest Level: YA ATOS Book Level: 5.6 AR Interest Level: UG AR Points: 21 AR Quiz: 139502EN Reading Counts Level: 5.7 Reading Counts Points: 28 Lexile Measure: 780 Lexile Code: HL (High-Low) Iowa Teen Award 2013 - 14.