After solving a deadly case in the small town of Lobo's Nod, seventeen-year-old Jazz, the son of history's most infamous serial murderer, travels to New York City to help the police track down the Hat-Dog Killer. Interest Level: YA ATOS Book Level: 4.9 AR Interest Level: UG AR Points: 17 AR Quiz: 159338EN Reading Counts Level: 5.4 Reading Counts Points: 26 Lexile Measure: 720 Lexile Code: HL (High-Low).